the minimum value of 2 X square + X - 1 is
singhalvishi27:
both the answers are incorrect.xxx correct answer is -9/8
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2x^2+x-1
=2x^2+(2-1)x-1
=2x^2+2x-x-1
=2(x^2+1)x-1(x+1)
=(2x-1) (x+1)
=2x^2+(2-1)x-1
=2x^2+2x-x-1
=2(x^2+1)x-1(x+1)
=(2x-1) (x+1)
wrong
kyo
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