-49a^2+70a-25=0

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Solution for -49a^2+70a-25=0 equation: 



-49a^2+70a-25=0

a = -49; b = 70; c = -25;
Δ = b2-4ac
Δ = 702-4·(-49)·(-25)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$a=\frac{-b}{2a}=\frac{-70}{-98}=5/7$

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