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5x*11x=880
We move all terms to the left:
5x*11x-(880)=0
Wy multiply elements
55x^2-880=0
a = 55; b = 0; c = -880;
Δ = b2-4ac
Δ = 02-4·55·(-880)
Δ = 193600
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{193600}=440$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-440}{2*55}=\frac{-440}{110} =-4 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+440}{2*55}=\frac{440}{110} =4 $
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