Question

Factory completely.

a) 3x2 -7x - 6

b) 4x2 - 9y2

Answer 1

For a use the quadratic formula.

Answer 2

For question (a) i mean.

Answer 3

\[a)~~~(3x+2)(x-3)\]

Answer 4

\[b)~~~~4x^2-9y^2=(2x)^2-(3y)^2=(2x+3y)(2x-3y)\]

Answer 5

is that it?

Answer 6

can you show me the next step with a?

Answer 7

The a and b I posted, are factored completely.

Answer 8

so as the answer what would i writ?

Answer 9

\[a)~~~~~~(3x+2)(x-3)~~~~~~~~and~~~~~~~~b)~~~~~~(2x+3y)(2x-3y)\]

Answer 10

can you please write down how you did it step by step?

Answer 11

@SolomonZelman please

Answer 12

I can't explain the a, I used my drain. I am not kidding my thing process was.

\[(3x-+~~~~~~)(x-+~~~~~~)~~~~~~~~~~~~plunging~~~i n~~factors~~of~~-6.\]

Answer 13

(not drain, brain)

Answer 14

thanks

Answer 15

Do you need more work on the b ?

Answer 16

that would be great.

Answer 17

\[4x^2-9y^2\]WE KNOW,\[4x^2=(2x)^2~~~~~~~~~~and~~~~~~~~~~9y^2=(3y)^2\]SO, RE-WRITE,\[(2x)^2-(3y)^2\]then I used\[a^2-b^2=(a+b)(a-b)\]