Question

Q. 1 A) Choose the correct alternative. 04
i) ax + by = c and mx + my = d. If am  bm, then these simultaneous equations have.
a) only one solution b) no solution
c) infinite number of solution d) only two solution
ii) If the roots of ax2 + bx + c = 0 are real and equal, then .
a) b2 - 4ac < 0 b) b2 - 4ac = 0
c) b2 - 4ac > 0 d) can not say
iii) Which is not a linear equation in two variables ? a) x + 7y = 1 b) 3x + 4y - xy = 0
c) 3x + 9 = 4y - 1 d) 3x = 4y
iv) The roots of a quadratic equation x2 - 15x + 54 = 0 are .
a) 9 and 6 b) 9 and -6
c) -9 and 6 d) -9 and -6

Answer 1

Answer:

c) infinite number of solution

b) b2 - 4ac = 0

a) x + 7y

a) 9 and 6

Step-by-step explanation:

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