Question

(x+3)(x+6)=x^2+ax+18=x=4?

Answer 1

Step-by-step explanation:

(x + 3) (x + 6) = x^2 + 6x + 3x + 18

= x^2 + 9x + 18

= x^2 + 3x + 6x + 18

= x(x + 3) + 6(x + 3)

a = 9

Hope this helps

at x = 4

4^2 + a 4 + 18 = 0

34+4a = 0

4a= -34

a= -34/4

a= -8.5