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A.Which constant should be added and subtracted to solve the quadratic ecolo5x2 - 12x +3=0 by the method of completing the square?If px? + 3x +q = 0 has two roots x = -1 x=-2 and find q-p.2116.20. |
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Answer» px^2+3x+q=0when x= -1p(-1)^2+3(-1)+q=0p+q= 3---(1)when x= -2px^2+3x+q=0p(-2)^2+3(-2)+q=04p+q= 6---(2).p+q= 3---(1)by subtracting 3p= 3p= 3/3=1p+q=31+q= 3q= 3-1=2so q- p= 2-1=1 |
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