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Factorise x^2 - 3x - 1 = 0 |
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Answer» ax2+bx+c=0 1x2+3x+−1=0 a=1 b=3 c=−1 x=−b±√b2−4ac2a x=−3±√32−4×1×−12×1 x=−3±√9−42 x=−3±√52 x=−3±2.2362 x1=−3−2.2362 x1=−5.2362 x1=−2.618 x2=−3+2.2362 x2=−0.7642 x2=−0.382 |
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