Question

Tentukan himpunan penyelesaian dari y=-2x+5 y=×pangkat2+3×-9 tentukan hp?

Answer 1

Verified answer

Y = -2x + 5

y = x² + 3x - 9
-2x + 5 = x² + 3x - 9
0 = x² + 5x - 14
=> (x + 7)(x - 2) = 0
=> x = -7 atau x = 2

y = -2x + 5
x = -7 => y = -2(-7) + 5 = 14 + 5 = 19 => (-7, 19)
x = 2 => y = -2(2) + 5 = -4 + 5 = 1 => (2, 1)

HP = {(-7, 19), (2, 1)}