Find the roots of 2x^2-2x=3, leaving your answer in it's simplest exact form.
First we need to rearrange our equation so it is in the correct form of ax2+bx+c=0.So we'd move the 3 over to the left hand side to give us 2x2-2x-3=0.We need to use the quadratic formula. Using x=( -b+/-(b2-4ac)1/2)/2a, where a=2, b=-2, c=-3.This gives us the roots x=(2+/-(28)1/2)/4 which is correct but is not in its simplist form. Use surd rules to simplify the 281/2 .Final answer of 1/2 +/- 1/2(7)1/2.
JA
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