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Solve x square -3x-10=0 by completing square method

Answer» Briliant
x2\xa0-3x - 10x2\xa0- 3x -10 + 9/4 -9/4 (we square the term obtained by dividing the coefficient of x by 2, after that we add and subtract the same in to the equation)now, (x2\xa0-3x + 9/4) -10-9/4(x-3/2)2\xa0- 49/4 = 0(x-3/2)2\xa0- (7/2)2\xa0= 0(x-3/2-7/2) (x-3/2 +7/2) = 0(x-10/2) (x + 4/2)x=5, -2 is the solution


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