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2x^2-28=-28
We move all terms to the left:
2x^2-28-(-28)=0
We add all the numbers together, and all the variables
2x^2=0
a = 2; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·2·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$x=\frac{-b}{2a}=\frac{0}{4}=0$
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