Q1Multiple choiceExercise 4.2
State whether the following quadratic equations have two distinct real roots. Justify your answer.
- (i)x2 – 3x + 4 = 0
- (ii)2x2 + x – 1 = 0
- (iii)2x2 – 6x + =0
- (iv)3x2 – 4x + 1 = 0 (v) (x + 4)2 – 8x = 0 (vi) (x – 2 2 ) – 2(x + 1) = 0
Show answer
(i) x2 – 3x + 4 = 0
(ii) 2x2 + x – 1 = 0
(iii) 2x2 – 6x + =0
(iv) 3x2 – 4x + 1 = 0 (v) (x + 4)2 – 8x = 0 (vi) (x – 2 2 ) – 2(x + 1) = 0