Question

Solve the following quadratic equation: 9a^2 b^2 x^2 - 16abcdx - 25 c^2 d^2 ==0​

Answer 1

9a2b2x2 - 16abcdx - 25c2d2 = 0

9a2b2x2 + 9abcdx - 25abcdx - 25c2d2 = 0

9abx(abx + cd) - 25cd(abx + cd) = 0

(9abx - 25cd)(abx + cd) = 0

x = 25cd / 9ab

x = - cd / ab

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