bjr
2x²+6x(5x-10x)+4x
= 2x² + 6x*5x + 6x*(-10x) + 4x
= 2x² + 30x² - 60x² + 4x
= -28x² + 4x
4x(5x+3) =
4x*5x + 4x*3 = 20x² + 12x
-4x(8x-3) =
-4x*8x - 4x*(-3) = -32x² + 12x
4x²(-2+5x³-10x) =
= 4x²*(-2) + 4x²*5x³ + 4x²*(-10x)
= -8x² + 20x⁵ - 40x³
= 20x⁵ - 40x³ - 8x²
2x²+6x(5x-10)+4x
= 2x² + 6x*5x + 6x*(-10) + 4x
tu termines
