if x^2+x=3 then find value of x
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Answer:
x = (-1) or x = 2
Step-by-step explanation:
x² + x = 3
x² + x -3 = 0
x² + x -2 = 1
x² + 2x -x -2 = 1
x(x +2) -1(x +2) = 1
(x +2) (x -1) = 1
(x +2) = 1 or (x -1) = 1
x = 1 -2 or x = 1 +1
x = (-1) or x = 2
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