lambemily03 lambemily03

21-11-2016
Mathematics

contestada

The solutions to the equation 2x(squared) + x - 1 = 2 are x=-3/2 and x = ?
What is the missing solution?

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tibboyz123 tibboyz123

21-11-2016

2x² + x - 1 = 2
2x² + x - 3 = 0
2x² - 2x + 3x -3 = 0
2x(x-1)+3(x-1)=0
(2x+3)(x-1)=0
x = -3/2 , x=1
Hence, the missing solution is x=1

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