Q.

f(2) = 4(2)² + 6(2)²

= 4(4) + 6(4)

= 16 + 24

= 40

f(x) = 4x² + 6x²

f(2) = 4(2²) + 6(2²)

f(2) = 4(4) + 6(4)

f(2) = 16 + 24

f(2) = 40

🙂