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2x+3(-4)=3x(2)-16
We move all terms to the left:
2x+3(-4)-(3x(2)-16)=0
We add all the numbers together, and all the variables
-(+3x^2-16)+2x+3(-4)=0
We add all the numbers together, and all the variables
-(+3x^2-16)+2x-12=0
We get rid of parentheses
-3x^2+2x+16-12=0
We add all the numbers together, and all the variables
-3x^2+2x+4=0
a = -3; b = 2; c = +4;
Δ = b2-4ac
Δ = 22-4·(-3)·4
Δ = 52
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{52}=\sqrt{4*13}=\sqrt{4}*\sqrt{13}=2\sqrt{13}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-2\sqrt{13}}{2*-3}=\frac{-2-2\sqrt{13}}{-6} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+2\sqrt{13}}{2*-3}=\frac{-2+2\sqrt{13}}{-6} $
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