Bonjour,
= -2x(-4x+5x)+4x(-5x-5x)-2x(-3x-3x)
= -2x(x)+4x(-10x)-2x(-6x)
= -2x²-40x²+12x²
= -30x²
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Bonjour,
= -2x(-4x+5x)+4x(-5x-5x)-2x(-3x-3x)
= -2x(x)+4x(-10x)-2x(-6x)
= -2x²-40x²+12x²
= -30x²