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315x^2-630x=0
a = 315; b = -630; c = 0;
Δ = b2-4ac
Δ = -6302-4·315·0
Δ = 396900
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{396900}=630$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-630)-630}{2*315}=\frac{0}{630} =0 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-630)+630}{2*315}=\frac{1260}{630} =2 $
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