Question

Can someone answer my question? For all x, (3x+7) ^2=?

Answer 1

Answer:

If that's +42x + 49, the answer is (3x + 7)(3x + 7) or (3x +

7)2

If that's -42x + 49, the answer is (3x - 7)(3x - 7) or (3x -

7)2

Answer 2

$\\ \tt\longmapsto (3x+7)^2$

• (a+b)^2=a^2+2ab+b^2[/tex]

$\\ \tt\longmapsto (3x)^2+2(3x)(7)+(7)^2$

$\\ \tt\longmapsto 9x^2+42x+49$

Done