Which of the following is a quadratic equation
(a) (x-2)(x+5)=x2-7x+1 (b) + 1 = 5 (c) x2 -3x+5= (x-2)2 (d) x3-2x2+3x+1=(2x-1)3
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(a) is the quadratic equation in the above options
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[a] is the correct answer
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