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aselbolotbekkyzy
@aselbolotbekkyzy
August 2022
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Olegatorsha
5•2х+144х +4=0
2х+144х=-5-4
146х=-9
Х=16,5
0 votes
Thanks 1
hpcn157ozf0tq
1)2x^2+5x-3=0
D=25+24=49=7^2
x1=-5-7/2*2=-3
x2=-5+7/4=1/2
2)4x^2+21x+5=0
D=441-80=361=19^2
x1=-21-19/2*4=-40/8=-5
x2=-21+19/2*4--2/8=-1/4
3)3x^2-10x+3=0
D=100-36=64=8^2
x1=10-8/2*3=2/6=1/3
x2=10+8/2*3=18/6=3
4)5x^2-14x-3=0
D=196+60=256=16^2
x1=14-16/2*5=-2/10=-1/5
x2=14+16/2*5=30/10=3
5)71x^2+144x+4=0
D=20736-1136=19600=140^2
x1=-144-140/2*71=-284/142=-2
x2=-144+140/2*71=-4/142=-2/71
1 votes
Thanks 1
aselbolotbekkyzy
спасибо большое
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Answers & Comments
2х+144х=-5-4
146х=-9
Х=16,5
D=25+24=49=7^2
x1=-5-7/2*2=-3
x2=-5+7/4=1/2
2)4x^2+21x+5=0
D=441-80=361=19^2
x1=-21-19/2*4=-40/8=-5
x2=-21+19/2*4--2/8=-1/4
3)3x^2-10x+3=0
D=100-36=64=8^2
x1=10-8/2*3=2/6=1/3
x2=10+8/2*3=18/6=3
4)5x^2-14x-3=0
D=196+60=256=16^2
x1=14-16/2*5=-2/10=-1/5
x2=14+16/2*5=30/10=3
5)71x^2+144x+4=0
D=20736-1136=19600=140^2
x1=-144-140/2*71=-284/142=-2
x2=-144+140/2*71=-4/142=-2/71