Question

plz give it's right answer
with explanation

best answer will be mark as brainliest

no spamming​

Answer 1

Step-by-step explanation:

(x+7)(x+7)=(x+7)²

=(a+b)² =a²+b²+2ab

=x²+49+2(x)(7)

=x²+14x+49

(3x+1)(3x-8)

(a+b) (a+c) = a² + a(b-c) -bc

=(3x)²+3x(1-8)-(1)(8)

=9x²+(3x)(7)-8

=9x²+21x-8

Answer 2

`Answer:

3. $(x+7)^{2}$

4. $9x^{2}$-21x-8

Step-by-step explanation:

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

=  $(x+7)^{2}$ (the answer is squared because the number is multiplying self)

for more simplification, the answer can be:

$x^{2} +49$ (we squared x and 7)

4. (3x+1)(3x-8)

(3x*3x)+(3x*1)+(3x*-8)+(1*-8)   [ok so here we are multiplying

3x and 3x, 3x times 1, 1 times -8, and 3x times -8. Basically, we are multiplying

every constant with each other]

= $9x^{2}$+3x-24x-8   [9x is squared because remember, we multiplied x to itself]

=$9x^{2}$-21x-8

Hope it helps!