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Gunakan aturan rantai dan rumus f'(x) = u'(x)v(x) + u(x)v'(x).
Misalkan u(x) = 2x³ - 4x², maka u'(x) = 8x² - 8x
Misalkan v(x) = 3x⁵ + 8x², maka v'(x) = 15x⁴ + 16x
=> f'(x) = u'(x)v(x) + u(x)v'(x)
=> f'(x) = (8x² - 8x)(3x⁵ + 8x²) + (2x³ - 4x²)(15x⁴ + 16x)
=> f'(x) = (24x⁷ + 64x⁴ - 24x⁶ - 64x³) + (30x⁷ + 32x⁴ - 60x⁶ - 64x³)
=> f'(x) = 54x⁷ - 84x⁶ + 96x⁴ - 128x³