Question

Tentukan himpunan penyelesaian splk y= -x+1 dan y= x²-1

Answer 1

Y = -x + 1
y = x² - 1

x² - 1 = - x + 1
x² - 1 + x - 1 = 0
x² + x - 2 = 0
(x + 2) (x - 1) = 0
x = - 2
x = 1

Hp : { -2, 1}