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drygina2200
@drygina2200
July 2022
1
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разложить на множители
1)х-3y+x^2-9y^2
2)9m^2+2mn+n^2-25
3)ab^5-b^5-ab^3+b^3
4)1-x^2+10xy-25y^2
решить уравнение
1)3х^2-12x=0
2)49x^2+14x^2+x=0
3)x^3-5x^2-x+5=0
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Answers & Comments
zheliabin217
(x-3y)+(x-3y)(x+3y)=x+3y
уравнения
x(3x-12)=0
x=0 3x=12;x=4
x(49x+14x+1)=0
x=0 63x=-1
x=-1/63
x(x^2-5x-1+5)=0
x=0 x^2-5x+4=0
d=25-16=9
x=5+3/2=4
x=5-3/2=1
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Answers & Comments
уравнения
x(3x-12)=0
x=0 3x=12;x=4
x(49x+14x+1)=0
x=0 63x=-1
x=-1/63
x(x^2-5x-1+5)=0
x=0 x^2-5x+4=0
d=25-16=9
x=5+3/2=4
x=5-3/2=1