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X2-4.8X-276.48=0
We add all the numbers together, and all the variables
X^2-4.8X-276.48=0
a = 1; b = -4.8; c = -276.48;
Δ = b2-4ac
Δ = -4.82-4·1·(-276.48)
Δ = 1128.96
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{-(-4.8)-\sqrt{1128.96}}{2*1}=\frac{4.8-\sqrt{1128.96}}{2} $$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-4.8)+\sqrt{1128.96}}{2*1}=\frac{4.8+\sqrt{1128.96}}{2} $
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