Question

if x=-3 then the value of x²+7a+12​

Answer 1

Answer:

a=-3

Step-by-step explanation:

9+7a+12=0

21+7a=0

7a=-21

a=-21/7

a=-3

Answer 2

Answer:

x²+7a+12

= (-3)^2+7a+12 = 0

= 9+7a+12 = 0

= 21+7a = 0

= 7a = -21

= a = -21/7

= a = -3