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larisasun1233456789
@larisasun1233456789
July 2022
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№ 1.6 и 1.7
даю 25 баллов.
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Asetinka1
N° 1.6
a) D=(4)²-4*4*(-3)=48
х(1)=-4+√64/2*4=-4+8/8=-4/8=-1/2=-0,5
х(2)= -4-√64/2*4=-4-8/8=-12/8=-4/2=-2
b) D=(1)²-4*12*(-1)=49
x(1)=-1+√49/2*12=-1+7/24=6/24=1/4=0,25
x(2)=-1-√49/2*12=-1-7/24=-8/24=-2/6=-1/3
в) D=(-7)²-4*6*(-20)=49+480=529
x(1)=-7-√529/2*6=
-7-23/12=-30/12=-15/6=-5/2=-2,5
x(2)=-7+√529/2*6=-7+23/12=16/12=
4/3=1,3
г) D=(-29)²-4*(-2)*15=841+120=961
x(1)= (-29)²-√961/2*15=
-29-31/30=-60/30=-2
x(2)=-29+31/30=2/30=1/15=0,06
1 votes
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Answers & Comments
a) D=(4)²-4*4*(-3)=48
х(1)=-4+√64/2*4=-4+8/8=-4/8=-1/2=-0,5
х(2)= -4-√64/2*4=-4-8/8=-12/8=-4/2=-2
b) D=(1)²-4*12*(-1)=49
x(1)=-1+√49/2*12=-1+7/24=6/24=1/4=0,25
x(2)=-1-√49/2*12=-1-7/24=-8/24=-2/6=-1/3
в) D=(-7)²-4*6*(-20)=49+480=529
x(1)=-7-√529/2*6=
-7-23/12=-30/12=-15/6=-5/2=-2,5
x(2)=-7+√529/2*6=-7+23/12=16/12=
4/3=1,3
г) D=(-29)²-4*(-2)*15=841+120=961
x(1)= (-29)²-√961/2*15=
-29-31/30=-60/30=-2
x(2)=-29+31/30=2/30=1/15=0,06