Rozwiąż równanie :
x²+6x=7
3x²+2x-2=0
2x=5x+1
2-4x=3x²
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x²+6x-7=0
Δ=b²-4ac
Δ=36+28=64
√Δ=8
x₁=(-6-8):2=-7
x₂=(-6+8):2=1
Δ=4+24=28
√Δ=√28=2√7
x₁=(-2-2√7):6=-⅓-⅓√7
x₂=(-2+2√7):6=-⅓+⅓√7
2x=5x+7
2x-5x=7
-3x=7
x=-7/3
-3x²-4x+2=0
Δ=16+24=40
√Δ=√40=2√10
x₁=(4-2√10):(-6)=-⅔+⅓√10
x₂=(4+2√10):(-6)=-⅔-⅓√10
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x²+6x=7
x²+6x-7=0
Δ=b²-4ac
Δ=36+28=64
√Δ=8
x₁=(-6-8):2=-7
x₂=(-6+8):2=1
3x²+2x-2=0
Δ=4+24=28
√Δ=√28=2√7
x₁=(-2-2√7):6=-⅓-⅓√7
x₂=(-2+2√7):6=-⅓+⅓√7
2x=5x+7
2x-5x=7
-3x=7
x=-7/3
2-4x=3x²
-3x²-4x+2=0
Δ=16+24=40
√Δ=√40=2√10
x₁=(4-2√10):(-6)=-⅔+⅓√10
x₂=(4+2√10):(-6)=-⅔-⅓√10