bagaimana cara pengerjaannya? no 38 & 37 , tolong yaaa

37.
= 4/4 x⁴ + 3/3 x³ + 5x + c
= x⁴ + x³ + 5x + c

38.
= 6/3 x³ - 4/2 x² + 1x
= 2x³ - 2x² + x

= (2(3)³ - 2(3)² + 3) - (2(-1)³ - 2(-1)² + (-1))
= ((2 × 27) - (2 × 9) + 3) - ((2 × (-1)) - (2 × 1) - 1)
= (54 - 18 + 3) - (-2 - 2 - 1)
= 39 - (-5)
= 39 + 5
= 44