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ewsdasd
@ewsdasd
July 2022
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разложить на множители:
1)3х2+30х+75
2)2х2-х-6
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Ртуть3
1)3х^2+30х+75=3(x^2+10x+25)
=3(x+5)^2=3(x+5)(x+5)
2)2х^2-х-6
Решим уравнение:
2х^2-х-6=0
D=1+2*4*6=49
x1=(1+7)/4=8/4=2
x2=(1-7)/4=-6/4=-3/2=-1/5
Тогда:
2х^2-х-6=2(x-2)(x+1,5)
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Answers & Comments
2)2х^2-х-6
Решим уравнение:
2х^2-х-6=0
D=1+2*4*6=49
x1=(1+7)/4=8/4=2
x2=(1-7)/4=-6/4=-3/2=-1/5
Тогда:
2х^2-х-6=2(x-2)(x+1,5)