Q24 of 58 Page 77

If then value of x is

We have,



⇒ (2x)(x) – (5)(8) = (6)(3) – (7)(-2)


⇒ 2x2 – 40 = 18 – (-14)


⇒ 2x2 – 40 = 18 + 14


⇒ x2 – 20 = 9 + 7


⇒ x2 – 20 = 16


⇒ x2 = 16 + 20


⇒ x2 = 36


⇒ x = √36


⇒ x = ±6


Hence, the correct option is (c)

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