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378x^2=378
We move all terms to the left:
378x^2-(378)=0
a = 378; b = 0; c = -378;
Δ = b2-4ac
Δ = 02-4·378·(-378)
Δ = 571536
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{571536}=756$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-756}{2*378}=\frac{-756}{756} =-1 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+756}{2*378}=\frac{756}{756} =1 $
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