Answer and explanation

Correct answer: A. 8

  1. Step 1: log(x y^2) = log x + 2 log y.
  2. Step 2: 2 + 2 x 3 = 8.
Answer
8.
Why not the others: 12 multiplies the logarithms; 5 forgets the exponent 2; 10 doubles the whole sum.

Practise more Algebra and complex numbers.

Free questions with an explanation for every one, and full timed Tawjihiya Bahrain (Secondary School Certificate) mock tests.