Q11 of 31 Page 1

Solve , a+b ≠ 0






⇒ (a + b + x)x = –ab


⇒ ax + bx + x2 = –ab


⇒ x2 + ax + bx + ab = 0
⇒ x(x + a) + b(x + a) = 0


⇒ (x + a)(x + b) = 0


⇒ x = –a or x = –b


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