-4x^2+72x-153=-2x^2+48x-81

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Solution for -4x^2+72x-153=-2x^2+48x-81 equation: 



-4x^2+72x-153=-2x^2+48x-81

We move all terms to the left:

-4x^2+72x-153-(-2x^2+48x-81)=0

We get rid of parentheses

-4x^2+2x^2-48x+72x+81-153=0

We add all the numbers together, and all the variables

-2x^2+24x-72=0

a = -2; b = 24; c = -72;
Δ = b2-4ac
Δ = 242-4·(-2)·(-72)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{-24}{-4}=+6$

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