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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,000

Hi;

.

636. Find the area of a triangle whose vertices are A(3,2), B(11,8), and C(8,12).

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,000

Hi;

The solution 636 is perfect. Excellent, bobbym!

637. Solve:

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,000

Hi;

The solution 637 (two values) is correct. Neat work, bobbym!

638. If

are the zeroes of the quadratic polynomial , find the value of.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Hi;

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,000

Hi;

The solution 638 is correct. Brilliant!

639. If 1 is a root of the quadratic equation

and the quadratic equation has equal roots, find the value of b.Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**LearnMathsFree: Videos on various topics.New: Integration Problem | Adding FractionsPopular: Continued Fractions | Metric Spaces | Duality**

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**NakulG****Member**- Registered: 2014-09-02
- Posts: 186

ganesh wrote:

Hi;

622. Evaluate:

.

Hi, Can someone show me the working for the above question?

Thanks

Nakul

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Try expanding where are coefficients you should try to determine.

**LearnMathsFree: Videos on various topics.New: Integration Problem | Adding FractionsPopular: Continued Fractions | Metric Spaces | Duality**

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**NakulG****Member**- Registered: 2014-09-02
- Posts: 186

Thanks it worked :-)

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,000

zetafunc wrote:

The solution 639 is correct. Excellent, zetafunc!

640. For what value of k is (x - 5) a factor of

?Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,379

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,000

Hi,

Good attempt, Monox D. I-Fly! Almost there!

641. If each interior angle of a regular polygon is 135°, find the number of diagonals of the polygon.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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