Question

Evaluate the expression 3.14(a2 + ab) when a = 4 and b = 2.

Answer 1

263.76

3.14x(42+42)

3.14x82=263.76 .

Answer 2

75.36

Explanation:

Given

3.14(a² + ab) ← substitute a = 4, b = 2 into the expression

= 3.14(4² + 4(2)) = 3.14(16 + 8) = 3.14 × 24 = 75.36