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2x*x=675
We move all terms to the left:
2x*x-(675)=0
Wy multiply elements
2x^2-675=0
a = 2; b = 0; c = -675;
Δ = b2-4ac
Δ = 02-4·2·(-675)
Δ = 5400
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{5400}=\sqrt{900*6}=\sqrt{900}*\sqrt{6}=30\sqrt{6}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-30\sqrt{6}}{2*2}=\frac{0-30\sqrt{6}}{4} =-\frac{30\sqrt{6}}{4} =-\frac{15\sqrt{6}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+30\sqrt{6}}{2*2}=\frac{0+30\sqrt{6}}{4} =\frac{30\sqrt{6}}{4} =\frac{15\sqrt{6}}{2} $
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