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11x^2+5x-10=-2
We move all terms to the left:
11x^2+5x-10-(-2)=0
We add all the numbers together, and all the variables
11x^2+5x-8=0
a = 11; b = 5; c = -8;
Δ = b2-4ac
Δ = 52-4·11·(-8)
Δ = 377
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{-(5)-\sqrt{377}}{2*11}=\frac{-5-\sqrt{377}}{22} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+\sqrt{377}}{2*11}=\frac{-5+\sqrt{377}}{22} $
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