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sinitsaarseniy
@sinitsaarseniy
June 2022
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Решите с 3 ,пожалуйста!!!
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sedinalana
X²+4x-3=0
x1+x2=-4 U x1*x2=-3
3)x1²+x2²=(x1+x2)²-2x1x2=(-4)²-2*(-3)=16+6=22
4)x1/x2+x2/x1=(x1²+x2²)/x1x2=22/(-3)=-22/3
5)1/x1²+1/x2²=(x2²+x1²)/x1²x1²=22/9
6)(x1-x2)²=x1²-2x1x2+x2²=22-2*(-3)=22+6=28
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Answers & Comments
x1+x2=-4 U x1*x2=-3
3)x1²+x2²=(x1+x2)²-2x1x2=(-4)²-2*(-3)=16+6=22
4)x1/x2+x2/x1=(x1²+x2²)/x1x2=22/(-3)=-22/3
5)1/x1²+1/x2²=(x2²+x1²)/x1²x1²=22/9
6)(x1-x2)²=x1²-2x1x2+x2²=22-2*(-3)=22+6=28