Question

Evaluate -a - 12a^2 for a = -1 a. -13 b. 13 c.-11

Answer 1

C

substitute a = - 1 into the expression

- (- 1) - 12(- 1)² = 1 - (12 × 1 ) = 1 - 12 = - 11 → C

Answer 2

c because PEMDAS start with the exponents so (-1)^2 =1 times -12=-12 and --1=1 so we end up with 1-12 or -11 which is C