2x^2-8=0
2x^2=8
x^2=8/2
x^2=4
x=2; -2
2x²-8=0
2x²=8
x²=8 : 2
х= ±√4
x=₁ 2 х₂= -2
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2x^2-8=0
2x^2=8
x^2=8/2
x^2=4
x=2; -2
2x²-8=0
2x²=8
x²=8 : 2
х= ±√4
x=₁ 2 х₂= -2