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How do you factor and solve 2x2 + x – 1 = 0

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An Intiative by Sri Chaitanya

x = – 1 and

x = 0, x = 1

x = 2, x = 3

x = 4, x = 7

answer is A.

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Detailed Solution

2x2 + x – 1 = 0
2x2 + 2x – x –1 = 0
2x (x + 1) + (x + 1) = 0
(x + 1) (2x + 1) =0
x = –1 and
2x – 1 = 0
2x = 1

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