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2x*x=3500
We move all terms to the left:
2x*x-(3500)=0
Wy multiply elements
2x^2-3500=0
a = 2; b = 0; c = -3500;
Δ = b2-4ac
Δ = 02-4·2·(-3500)
Δ = 28000
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{28000}=\sqrt{400*70}=\sqrt{400}*\sqrt{70}=20\sqrt{70}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-20\sqrt{70}}{2*2}=\frac{0-20\sqrt{70}}{4} =-\frac{20\sqrt{70}}{4} =-5\sqrt{70} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+20\sqrt{70}}{2*2}=\frac{0+20\sqrt{70}}{4} =\frac{20\sqrt{70}}{4} =5\sqrt{70} $
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