(ii) x2 2x-9 0Solution : Compare x2 + 2x-9 = 0 withax2 + bx + c = 0b= – InterviewSolution

1.

(ii) x2 2x-9 0Solution : Compare x2 + 2x-9 = 0 withax2 + bx + c = 0b= 2, c=1,b2-4ac- 22-4xD-4-□D= 40,'. b2-4ac > 0the roots of the equation are real andunequal.

Answer»

a = 1, b = 2, c = - 9

b^2 - 4ac = 2^2 - 4*1*-9D = 4 - (-36)D = 40

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