InterviewSolution
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InterviewSolution
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Find (X + 2)( X + 1) = (X + 4 )(x + 3) is a quadratic equation |
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Answer» (X+2)(x+1) = (x+4)(x+3)X(x+1)+2(x+1) = X(x+3)+4(x+3)X2 + x + 2x + 2 = X2 + 3x + 4x + 12X2 + 3x + 2 = X2 + 7x + 12 X2 + 3x + 2 - X2 - 7x - 12 = 0 4x - 10 = 0 .Hence , It is not a quadratic equation. (X + 2)( X + 1) = (X + 4 )(x + 3)\xa0x ( x + 1) + 2 ( x + 1) = x ( x+ 3) + 4 ( x+ 3)x2 + x + 2x + 1 = x2 + 3x + 4x + 12x2 + 3x + 1 = x2 + 7x + 123x + 1 = 7x + 127x - 3x = 1 - 124x = -11 is not a quadratic equation |
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