Question

1. The roots of quadratic equation 5x* - 4x + 5 = 0 are
(n) Real & equal (b) real & unequal (c) mot real (d) not real but equal

2. Which constant should be added and subtracted to solve the quadratie
equation 1x*-V3x+5= by the method of completing the square?
(n) 9/16 (b) 3/16 (c) 34 (d) V314
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Answer 1

Answer:

1. If discriminant is positive (that is, if b2 � 4ac > 0), then the roots and � of equation (1) are real andunequal. 2. If discriminant is zero (that is, if b2 � 4ac = 0), then the roots and � of equation (1) are real and equal.

Answer 2

Answer:

1st :;

5x2-4x+5

D=b2-4ac

by comparing the given equation with the standard form of equation we get a=5 ,b =-4 and c=5

substituting the values in D=b2 -4ac

D=(-4)2-4×5×5

D = 8-100

D = -92 less than zero ao the equation has no real roots