Question

Which of the following statement is correct?
Select one:
a. (3x + 2)2 = 9x2 + 12x + 4
b. (3x + 2)2 = 3x2 + 12x + 4
c. (3x + 2)2 = 3x2 - 12x + 4
d. (3x + 2)2 = 9x2 - 12x – 4

Answer 1

Answer:

${(3x + 2)}^{2} = {a}^{2} + 2ab + {b}^{2} \\ = {3x}^{2} + 2(3x \times 2) + {2 }^{2} \\ = {9x}^{2} + 12x + 4$

Hope it helps you