Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**Thompsonnn****Member**- Registered: 2017-08-01
- Posts: 21

t+8 t-3

Offline

The quadratic equation has solutions and This is because when you replace with into the equation, you get:

Similarly:

So when we plug and into the left-hand side of , we get -- which means that they satisfy the equation. So we can call them solutions.Does that make sense?

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

Offline

**Thompsonnn****Member**- Registered: 2017-08-01
- Posts: 21

yes it does thank you!

Offline

Great! But remember to discard one of the solutions, since time cannot be negative.

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

Offline

**Thompsonnn****Member**- Registered: 2017-08-01
- Posts: 21

do i do number 20 the same?

Offline

It can probably be done in a similar way -- let us know if you have any problems.

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

Offline