Объяснение:
1) -5y(y+3) = -5y×y+(-5y)×3 = -5y²-15y
2) 4x²(-2x³-x²+1) = 4x²×(-2x³)+4x²×(-x²)+4x²×1 = -8x⁵-4x⁴+4x²
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Объяснение:
1) -5y(y+3) = -5y×y+(-5y)×3 = -5y²-15y
2) 4x²(-2x³-x²+1) = 4x²×(-2x³)+4x²×(-x²)+4x²×1 = -8x⁵-4x⁴+4x²
2)4x^2(-2x^3-x^2+1)=-8x^5-4x^4+4x^2