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Verified answer
Kelas 10 MatematikaBab Persamaan Kuadrat
x - y = 7
y = x - 7
y = y
x² + 3x - 10 = x - 7
x² + 3x - x - 10 + 7 = 0
x² + 2x - 3 = 0
(x + 3) (x - 1) = 0
x + 3 = 0
x = -3
y = x - 7
y = -3 - 7
y = -10
(-3, -10)
x -1 = 0
x = 1
y = x - 7
y = 1 - 7
y = -6
(1, -6)