Find the roots of quadratic equation: x2 + x – 42 = 0 ?

– by 0

A. 14, -3
B.  -7, 6
C. -6, 7
D.  -8, 7

Explanation:

x2 + 7x – 6x + 42 = 0
x(x + 7) – 6(x + 7) = 0
(x + 7)(x – 6) = 0 => x = -7, 6

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