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x2-70=291
We move all terms to the left:
x2-70-(291)=0
We add all the numbers together, and all the variables
x^2-361=0
a = 1; b = 0; c = -361;
Δ = b2-4ac
Δ = 02-4·1·(-361)
Δ = 1444
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{1444}=38$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-38}{2*1}=\frac{-38}{2} =-19 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+38}{2*1}=\frac{38}{2} =19 $
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