(7m-2)(7m-2)=0

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Solution for (7m-2)(7m-2)=0 equation: 



(7m-2)(7m-2)=0

We multiply parentheses ..

(+49m^2-14m-14m+4)=0

We get rid of parentheses

49m^2-14m-14m+4=0

We add all the numbers together, and all the variables

49m^2-28m+4=0

a = 49; b = -28; c = +4;
Δ = b2-4ac
Δ = -282-4·49·4
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$m=\frac{-b}{2a}=\frac{28}{98}=2/7$

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