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3x*5x=11.36
We move all terms to the left:
3x*5x-(11.36)=0
We add all the numbers together, and all the variables
3x*5x-11.36=0
Wy multiply elements
15x^2-11.36=0
a = 15; b = 0; c = -11.36;
Δ = b2-4ac
Δ = 02-4·15·(-11.36)
Δ = 681.6
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-\sqrt{681.6}}{2*15}=\frac{0-\sqrt{681.6}}{30} =-\frac{\sqrt{}}{30} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{681.6}}{2*15}=\frac{0+\sqrt{681.6}}{30} =\frac{\sqrt{}}{30} $
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