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प्रश्न
Solve for x:
5x2 : 5x = 25 : 1
उत्तर
5x2 : 5x = 25 : 1
⇒ `(5x^2)/(5x) = (25)/(1)`
⇒ `(5x^2)/(5x) = (5^2)/(1)`
⇒ 5x2 = 52 x 5x
⇒ 5x2 = 52+x
⇒ x2 = 2 + x
⇒ x2 - x - 2 = 0
⇒ (x - 2)(x + 1) = 0
⇒ x - 2 = 0 or x + 1 = 0
⇒ x = 2 or x = -1.
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