Question

Fanning and Medal
Factor completely: 9x2 + 42x + 49

(3x + 7)(3x − 7)

(9x − 7)(9x − 7)

(3x + 7)(3x + 7)

(9x + 7)(9x + 7)

Answer 1

9x² + 42x + 49
Find the difference of squares (or the square root of first and last term)
9x²--factor-->3x*3x
49--factor-->7*7
(3x + 7)(3x + 7)

Answer 2

I just want some one to check for me

Answer 3

@satellite73

Answer 4

@Jamierox4ev3r

Answer 5

Good work, you are right @HelloGoodmorning

Answer 6

You can check yourself whether you are right or not by :

(3x+7)(3x+7) = \((3x+7)^2 \\
\text{As : } \space (a+b)^2 = a^2 + 2ab + b^2 \\
(3x+7)^2 = (3x)^2 + 7^2 + 2(3x)(7) = 9x^2 + 49 + 42 x \\
9x^2 + 42x + 49 \)

Hence verified that you are right!

Answer 7

Lol thank you very much

Answer 8

You're welcome ! :)

Answer 9

:)