Question

evaluate each of the following identities ( 3x +7) (3 x+ 7)​

Answer 1

Answer:

9x^2+49+42

Step-by-step explanation:

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

=(3x+7)^2

=(3x)^2+7^2+2×3x×7

=9x^2+49+42

Answer 2

Answer:  9$x^{2}$+49+42x

Step-by-step explanation:

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

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

Identity: $(a+b)^{2} =a^{2} +b^{2} +2ab$

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

= 9$x^{2}$+49+42x