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x(a + b + x) + ab = 0 [since, a + b 0]
2
x + ax + bx + ab = 0
x(x + a) + b(x + a) = 0
(x + a)(x + b) = 0
x + a = 0 or x + b = 0
x = -a or x = -b
Hence, the solutions are x = -a, -b
NCERT EXERCISE 4.2
Q2.
7
