Question

(a) (x+2)2=2(x+3),(b) x2+3x=(-1)(1-3x)2 ,(c) (x+2)(x-1)=x2-2x-3 (d) x3-x2+2x+1=(x+1)3 Which one of the following is not a quadratic equation

Answer 1

option (c) is not. quadratic equation