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121x^2+121x-716=0
a = 121; b = 121; c = -716;
Δ = b2-4ac
Δ = 1212-4·121·(-716)
Δ = 361185
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{361185}=\sqrt{121*2985}=\sqrt{121}*\sqrt{2985}=11\sqrt{2985}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(121)-11\sqrt{2985}}{2*121}=\frac{-121-11\sqrt{2985}}{242} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(121)+11\sqrt{2985}}{2*121}=\frac{-121+11\sqrt{2985}}{242} $
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