Question

Use the quadratic formula to solve 4y2 + 8y + 7 = 4.

Answer 1

do i devide by 4 before i begin?

Answer 2

@ganeshie8

Answer 3

No you subtract the 4 by like terms for to set it equal to zero?

Answer 4

ohhh ok

Answer 5

i can get it from here thanks
'

Answer 6

like terms remember that no matter what.

Answer 7

Solve the quadratic equation 12x2 - 3x - 9 = 0 by factoring.

Answer 8

Here i dont devide either just solve

Answer 9

You know how to factor?
Have you learned about FOIL?

Answer 10

i* heard about it

Answer 11

FOIL is an acronym.

First
Outside
Inside
Last

I'll give you an example of how FOIL works.
Take a look at this:

(4x + 3) (2x + 2)

We need to take this,
and turn it into a quadratic equation.

We do this using FOIL.
Remember what FOIL stands for.

The F stands for FIRST.

There are two sets of parentheses here.

We multiply the FIRST parts, of each set, together.

Answer 12

So, that means.....4x times 2x.

Which is 8x^2. (Eight X squared)

You get it so far?

Answer 13

yep

Answer 14

Now, the O stands for OUTSIDE.

We need to multiply the OUTSIDE parts, of each set, together.

So, that means 4x times 2.
Which is 8x.

Get it?

Answer 15

yes

Answer 16

Now, we need to keep track.

We already solved the F part of FOIL.

F = 8x^2

We also just solved the O part of FOIL.

O = 8x