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x*x+3x-5=180
We move all terms to the left:
x*x+3x-5-(180)=0
We add all the numbers together, and all the variables
3x+x*x-185=0
Wy multiply elements
x^2+3x-185=0
a = 1; b = 3; c = -185;
Δ = b2-4ac
Δ = 32-4·1·(-185)
Δ = 749
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(3)-\sqrt{749}}{2*1}=\frac{-3-\sqrt{749}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+\sqrt{749}}{2*1}=\frac{-3+\sqrt{749}}{2} $
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