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**Abbey78336**- Replies: 0

Just like the quadratic formula. I have made a linear formula as i was thinking through how the quadratic formula (making x the subject of ax^2 + bx + c = 0) so i also made x the subject of the standard linear equation

y=mx+c

y-c=mx+c-c

y-c=mx

(y-c)/m=(mx)/m

(y-c)/m=x

PROOF

Solve;

1) 15=2x+3

x=(y-c)/m

x=(15-3)/2

x=12/2

x=6 CORRECT

**Abbey78336**- Replies: 6

Can any one solve this ?

2x^(-2) + 5x + 10 = 0

**Abbey78336**- Replies: 3

If Two US pennies Weigh as one quater. 4 kg of US pennies make $100 4 kg of US quaters will make ????

The question said make x the subject of the formula NOT what is this type of equation

**Abbey78336**- Replies: 2

Make x the subject of the ax^3 + bx^2 + cx = -d

**Abbey78336**- Replies: 1

How can i become a pm or an administrator

**Abbey78336**- Replies: 3

A square with a side (x+7)cm and its area as 33cm^2 find its perimeter

**Abbey78336**- Replies: 1

Has anyone of you ever heard of the cubic formula. Or ever dreamt of it existing so cubic equations could be easily solved. Let our dreams come true. I have been working on it recently but i can't do it alone. I request anyone with an idea to start. We can make a cubic formula. Waiting for your help

Is there a formula like a the quadratic formula where i just plug in the a,b....y,z

Wait i have heard of a cubic formula! What is it ¿¿¿¿

[-2.1838+3.84798i]

[-2.1838-3.84798i]

[4.3676] try proving it

Not a mistake ! So do you mean it can't be solved ?

**Abbey78336**- Replies: 17

2x^3 + x = 171

**Abbey78336**- Replies: 1

How many positive integers less than 2002 are a multiple of 3 or 4 but not 5

So we will use 6 giving 66+2c=76 c=5 and we know that a=3 b=6 c=5 abc=365.

AS SIMPLE AS DYING

Another one

From where? Step by step

**Abbey78336**- Replies: 6

The sum of A number and the sum of its digits is 379. What is the number???????????

What if it is 2x^2 + 432/(49x) = 3

Sorry I made a mistake it was supposed to be 2x^3 +(432/(49x)) =3

Then solve it step by step

It is not true !

-a^2 is not equal to -1×a^2

PROOF

if a=5 -a^2=(-5)^2=-5×-5=+25 but -1×a^2=-1×5^2=-1×25=-25

So -25 is not equal to +25

**Abbey78336**- Replies: 9

2x^2 + (432/49x) = 3