5x2+70x+245=0.x=

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Solution for 5x2+70x+245=0.x= equation: 



5x^2+70x+245=0.x=

We move all terms to the left:

5x^2+70x+245-(0.x)=0

We add all the numbers together, and all the variables

5x^2+70x+245-0=0

We add all the numbers together, and all the variables

5x^2+70x+245=0

a = 5; b = 70; c = +245;
Δ = b2-4ac
Δ = 702-4·5·245
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{-70}{10}=-7$

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