Question

5. Solve the following quadratic equations by
factorisation :
(i) x+20/x = 12​

Answer 1

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: