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Solve: x2 – x = 2
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x^2 - x - 2 = 0
D = b^2 - 4ac = (-1)^2 - 4 * 1 * (-2) = 1 + 8 = 9
x = [ -b - sqrt(D) ] / 2a or x = [ -b + sqrt(D) ] / 2a
x = [1 - 3] / 2 = -1 or x = [1+3] / 2 = 2
x = -1
x = 2
I'm sure you can factor this haha, but I've never learnt it sadly.. =(
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