-7x^2+34x-27=-4x^2+22x-15

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Solution for -7x^2+34x-27=-4x^2+22x-15 equation:



-7x^2+34x-27=-4x^2+22x-15
We move all terms to the left:
-7x^2+34x-27-(-4x^2+22x-15)=0
We get rid of parentheses
-7x^2+4x^2-22x+34x+15-27=0
We add all the numbers together, and all the variables
-3x^2+12x-12=0
a = -3; b = 12; c = -12;
Δ = b2-4ac
Δ = 122-4·(-3)·(-12)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{-12}{-6}=+2$

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