No 13 pake cara…terimakasih

X² + 4x – 12

a. sumbu simetri

-b/2a

-4/2 = -2

b. nilai minimum

(-2)² + 4(-2) -12

4 + -8 -12 = -16

c. titik optimum

(sumbu simetri, nilai minimum)

(-2,-16)

d. b²- 4ac

4² – 4 (1) (-12)

16 + 48 = 64