Solve the following quadratic equation by factorization method: 9x2 – 25 = 0.

Solve the following quadratic equation by factorization method:
9x2 – 25 = 0.
Ans.
9x2 – 25 = 0
(3x)2 – 52 =0
(3x + 5)(3x – 5) = 0
∴ 3x + 5 = 0   OR   3x – 5 = 0
∴ x = - 5/3    OR   x = 5/3

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