Question

Solve the quadratic equation –x2 +x -2 =0

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Answer 1

Answer:

$x {}^{2} + x - 2 = 0 \\ x {}^{2} + 2x - x - 2 = 0 \\ x(x + 2) - 1(x + 2) = 0 \\ (x + 2)(x - 1) = 0 \\ x - 1 = 0 \\ x = 1 \\ x + 2 = 0 \\ x = - 2$

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