f(x)=2x⁵-6x⁴-x²+4x
G(x)= 1.5x²-x⁴+3x²+3x-1
3f(x)-4g(x)=
3f(x)-4g(x)= 3 * (2x⁵ - 6x⁴ - x² + 4x) - 4 * (1.5x² - x⁴ + 3x² + 3x - 1) =
6x⁵ - 18x⁴ - 3x² + 12x - 6x² + 4x⁴ - 12x² - 12x + 4 = 6x⁵ - 14x⁴ - 21x² + 4
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f(x)=2x⁵-6x⁴-x²+4x
G(x)= 1.5x²-x⁴+3x²+3x-1
3f(x)-4g(x)= 3 * (2x⁵ - 6x⁴ - x² + 4x) - 4 * (1.5x² - x⁴ + 3x² + 3x - 1) =
6x⁵ - 18x⁴ - 3x² + 12x - 6x² + 4x⁴ - 12x² - 12x + 4 = 6x⁵ - 14x⁴ - 21x² + 4