A binary operation ,*, is defined on the set R, of real numbers by (a…

A binary operation ,*, is defined on the set R, of real numbers by (a * b = a^{2} + b + ab). Find the value of x for which (5 * x = 37).

  • A.
    7
  • B.
    2
  • C.
    -2
  • D.
    -7
Correct Answer: Option B
Explanation

(a * b = a^{2} + b + ab)

(5 * x = 5^{2} + x + 5x = 37)

(25 + 6x = 37 implies 6x = 12)

(x = 2)

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