Question 1 Which of the following is a quadratic equation? (a) x2+2x+1=(4–x)2+3 (b) −2x2=(5−x)(2x−25) (c) (k+1)x2+32 x=7, where k =−1 (d) x3−x2=(x−1)3
Which of the following is not a quadratic equation?(a) 3x−x2=x2+5(b) (x+2)2=2(x2−5)(c) (2x+3)2=2x2+6(d) (x−1)2=3x2+x−2
Question 2 Which of the following is not a quadratic equation? (a) 2(x−1)2=4x2−2x+1 (b) 2x−x2=x2+5 (c) (√2x+√3)2=3x2−5x (d) (x2+2x)2=x4+3+4x3