2x²+7x-9=0D=b²-4ac=7²+4*2*9=49+72=121=11² x₁===1x₂= 100x²-16=0100x²=16x²=x₁,₂=±3x²=18x3x²-18x=0
x(3x-18)=0x=0 3x-18=0 3x=18 x=6x²-16x+63=0
D=b²-4ac=(-16)²-4*63=256-252=4=2²
x_{1,2}= \frac{-b+-\sqrt{D}}{2a}[/tex] x₁=x₂=
2x²+7x-9=0
=
=1
D=b²-4ac=7²+4*2*9=49+72=121=11²
x₁=
x₂=
100x²-16=0
100x²=16
x²=
x₁,₂=±
3x²=18x
3x²-18x=0
x(3x-18)=0
x=0 3x-18=0
3x=18
x=6
x²-16x+63=0
D=b²-4ac=(-16)²-4*63=256-252=4=2²
x_{1,2}= \frac{-b+-\sqrt{D}}{2a}[/tex]
x₁=
x₂=