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@xacg
August 2022
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DzhamaD
1) х²+2х=8
х²+2х-8=0
D=4+32
D=36
x1=(-2+6):2=4
x2=(-2-6):2=-4
2) 10=7x-x²
x²-7x+10=0
D=49-40
D=9
x1=(7-3):2=2
x2=(7+3):2=5
4) x²-8x+15=0
D=64-60
D=4
x1=(8-2):2=3
x2=(8+2):2=5
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Answers & Comments
х²+2х-8=0
D=4+32
D=36
x1=(-2+6):2=4
x2=(-2-6):2=-4
2) 10=7x-x²
x²-7x+10=0
D=49-40
D=9
x1=(7-3):2=2
x2=(7+3):2=5
4) x²-8x+15=0
D=64-60
D=4
x1=(8-2):2=3
x2=(8+2):2=5