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koltysheva00
@koltysheva00
August 2022
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разложите на множители 1)m2-10m+25,2)х2-3х-10,3)3х2-8х+5,4)2х+8-х2
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1401Tamara
1)m^2-10m+25= (m-5)(m-5)
2)х^2-3х-10 =
х^2-5х + 2x -10 =
x(x-5) + 2(x-5) = (x-5)(x+2)
3)3х^2-8х+5 =
3х^2-5х - 3x +5 =
= x(3x-5) -(3x-5) = (3x-5)(x-1)
4)2х+8-х^2=
2х+4 + 4 -х^2= (4-x^2) + (2x+4) = (2+x)(2-x) + 2(2+x) =
=(2+x)(2 - x +2)=(2+x)(4-x)
1 votes
Thanks 1
koltysheva00
Спасибо большое!)
1401Tamara
пожалуйста
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Answers & Comments
2)х^2-3х-10 = х^2-5х + 2x -10 = x(x-5) + 2(x-5) = (x-5)(x+2)
3)3х^2-8х+5 = 3х^2-5х - 3x +5 = = x(3x-5) -(3x-5) = (3x-5)(x-1)
4)2х+8-х^2= 2х+4 + 4 -х^2= (4-x^2) + (2x+4) = (2+x)(2-x) + 2(2+x) =
=(2+x)(2 - x +2)=(2+x)(4-x)