Question

1. Evaluate each of the following using identities: (a) (3x+7)(3x+7)



please help me this question plz!!!​

Answer 1

Answer:

3x^2+2(3x) (7) +7^2

9x^2+42x+49

Answer 2

Step-by-step explanation:

(a+b) (a+b)

${a}^{2} + {b}^{2} + 2ab \\ 3 {x }^{2} + 7 ^{2} + 2 \times 3 {x}^{2} \times 7 \\ 3 {x}^{2} + 49 + 42 {x }^{2} \\ 45 {x}^{2} + 49$