Question

Tentukan nilai (m) agar sistem persamaan
Y = x + 2m
Y = x pangkat 2 - 4x - 21

Answer 1

Verified answer

Y = x^2 - 4x - 21
y=0
0 = x^2 - 4x - 21
0 = (x - 7)(x + 3)
x = 7 atau x = -3
substitusi untuk :
x = 7 maka
x + 2m = 0
7 + 2m = 0
2m = -7
m = -7/2
x = -3
-3 + 2m = 0
2m = 3
m = 3/2