Question

Tentukan penyelesaian berikut :
-1 = 2x - y
y = 2x2 + 3x - 2

Answer 1

Verified answer

2×2+3×(-2)
=4+(-5)
=4-5
=-1

Answer 2

Bab Persamaan Kuadrat
Matematika SMA Kelas X

-1 = 2x - y
y = 2x + 1

y = y
2x² + 3x - 2 = 2x + 1
2x² + 3x - 2x - 2 - 1 = 0
2x² + x - 3 = 0
(2x + 3) (x - 1) = 0

2x + 3 = 0
2x = -3
x = -3/2
y = 2x + 1
y = 2 . (-3/2) + 1
y = -3 + 1
y = -2
(-3/2, -2)

x - 1 = 0
x = 1
y = 2x + 1
y = 2 . 1 + 1
y = 3
(1, 3)

HP = {(-3/2, -2), (1,3)}