3х²+9х+6=0
x²+3x+2=0 D=9-8=1
x₁=(-3+1)/2=-1
x₂=(-3-1)/2=-2
x²+8x+7=0 D=64-28=36=6²
x₁=(-8+6)/2=-1
x₂=(-8-6)/2=-7
2x²+16x+32=0
x²+8x+16=0 D=64-64=0
x₁=x₂=-8/2=-4
3x²-48=0
3(x²-16)=0
x²-16=0
x²=16
x₁=4
x₂=-4
3х²+9х+6=0
x²+3x+2=0 D=9-8=1
x₁=(-3+1)/2=-1
x₂=(-3-1)/2=-2
x²+8x+7=0 D=64-28=36=6²
x₁=(-8+6)/2=-1
x₂=(-8-6)/2=-7
2x²+16x+32=0
x²+8x+16=0 D=64-64=0
x₁=x₂=-8/2=-4
x²+3x+2=0 D=9-8=1
x₁=(-3+1)/2=-1
x₂=(-3-1)/2=-2
3x²-48=0
3(x²-16)=0
x²-16=0
x²=16
x₁=4
x₂=-4