Question

Evaluate 3a^2 + 4b^2 for a = 2 and b = 3

A) 168

B) 48

C) 36

Answer 1

B

Explanation:

Given

3a² + 4b² ( substitute a = 2 and b = 3 into the expression )

= 3(2)² + 4(3)²

= 3(4) + 4(9)

= 12 + 36

= 48 → B