5. Solve the following quadratic equations by
factorisation :
(i) x+20/x = 12
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Answer:
(i) x2 – 3x – 10 = 0
= x2 – 5x + 2x – 10
= x(x – 5) +2(x – 5)
= (x – 5)(x + 2)
Roots of this equation are the values for which = (x – 5)(x + 2) = 0
Therefore, (x – 5) = 0 or (x + 2) = 0
i.e., x = 5 or x = -2
Step-by-step explanation:
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