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Dupeeoo
@Dupeeoo
July 2022
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разложите на множители: 1)a^2+4b^2-9c^2-4ab 2) x^3+x^2-xy^2-y^2
10ballov
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Vasily1975
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1) a²-4*a*b+4*b²-9*c²=(a-2*b)²-9*c²=(a-2*b+3*c)*(a-2*b-3*c)
2) x³+x²-x*y²-y²=x²*(x+1)-y²*(x+1)=(x²-y²)*(x+1)=(x+y)*(x-y)*(x+1)
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1) a²-4*a*b+4*b²-9*c²=(a-2*b)²-9*c²=(a-2*b+3*c)*(a-2*b-3*c)2) x³+x²-x*y²-y²=x²*(x+1)-y²*(x+1)=(x²-y²)*(x+1)=(x+y)*(x-y)*(x+1)