Q2 of 83 Page 90

Find the roots of the following equations by the method of perfect square:

(x + 2)(x + 3) = 240

(x + 2)(x + 3) = 240

⇒ x2 + 2x + 3x + 6 = 240


⇒ x2 + 5x – 234 = 0






⇒(x – 18) = 0 or (x + 13) = 0


⇒ x = 18 or x = – 13


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