Answer :

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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