Question

$x { }^{2} + x - 2 = 0$

Answer 1

${x}^{2} + x - 2 = 0 \\ {x}^{2} + 2x - x - 2 = 0 \\ x(x + 2) - 1(x + 2) = 0 \\ (x + 2)(x - 1) = 0$
so ..it is now factorised


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