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Find 1/(a - 1) + 1/(b - 1), where a and b are the roots of the quadratic equation 2x^2-7x+2 = x^2 - 9x + 1.

 Oct 19, 2021
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notice how 2x^2-7x+2=x^2-9x+1 is equivalent to x^2+2x+1. This factors to (x+1)^2

 

a = b, so 1/(-1-1)*2= -1/2*2= -1

 Oct 19, 2021

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