Question

(3-a)^2+(a-2)(a+2)-2(7+3a^2)

Answer 1

9-6a+a²+a²-4-14-6a²=-4a²-6a-9

Answer 2

$9+ a^{2} -6a+ a^{2} -4-14-6 a^{2} =-4 a^{2} -6a-9$