Question

11. f(x) = 4x4 - x2 + 9. Find f(-4).​

Answer 1

f ( -4 ) = 1024 + 8 + 9

Explanation:

f ( x ) = 4x⁴ - x² + 9

If f ( - 4 ) then we get

f ( -4 ) = 4 ( -4)⁴ - ( - 4)² + 9

Expand the exponents

f ( - 4 ) = 4 ( 256 ) + 8 + 9

multiply the numbers

f ( -4 ) = 1024 + 8 + 9