No 4 a Tentukan nilai a jika diketahui A/2 (x’3-16)dx=-36

4a)

1/4x⁴ – 8x² + C = -36
1/4a⁴ – 8a² – (4 – 32) = -36
1/4a⁴ – 8a² + 28 = -36

a⁴ – 32a² + 112 = -144
a⁴ – 32a² + 256 = 0
(a² + 16)² = 0
a² + 16 = 0
a² = -16
a = ± 4 (imajiner)