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77Star77
@77Star77
August 2022
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ТатМих
Verified answer
Х²+16=(2х-1)²
х²+16=4х²-4х+1
3х²-4х-15=0
D=16+180
D=196
√D=√196=14
x1=(4+14)/6=3
x2=(4-14)/6=-10/6=-5/2=-2/5
11+5x=(x+3)²
11+5x=x²+6x+9
x²+x-2=0
D=1+8
D=9
√D=√9=3
x1=(-1-3)/2=-2
x2=(-1+3)/2=1
5-2x=(x-1)²
5-2x=x²-2x+1
x²=4
x1=+2
x2=-2
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Answers & Comments
Verified answer
Х²+16=(2х-1)²х²+16=4х²-4х+1
3х²-4х-15=0
D=16+180
D=196
√D=√196=14
x1=(4+14)/6=3
x2=(4-14)/6=-10/6=-5/2=-2/5
11+5x=(x+3)²
11+5x=x²+6x+9
x²+x-2=0
D=1+8
D=9
√D=√9=3
x1=(-1-3)/2=-2
x2=(-1+3)/2=1
5-2x=(x-1)²
5-2x=x²-2x+1
x²=4
x1=+2
x2=-2