Question

would 81x^2+72x+16 be (9x+9)(9x+7) in factored form?

Answer 1

no because
\[7\times 9\neq16\]

Answer 2

so 8 and 2?

Answer 3

but what about the 72?

Answer 4

no. you got the 9 right. what is 16 the square of?

Answer 5

that is the one that will give it to you

Answer 6

16^2 is 256

Answer 7

question is "what is 16 the square of" or "what number squared gives 16"

Answer 8

4

Answer 9

yes and that completes the problem (and completes the square)

Answer 10

(9x+4)^2

Answer 11

the end part would be 63 instead of 16

Answer 12

So (9x+4)(9x+4) is the answer?

Answer 13

yes

Answer 14

gblover multiply out
\[(9x+4)^2\] and see that it is right

Answer 15

9x*9x=81x^2, 9x*4*2=72x, 4*4=16

Answer 16

first term will be
\[81x^2\] last term will be
\[4^2=16\]
and middle term will be
\[2\times 9\times 4x\]

Answer 17

what pmel11 said