10x+18=5x2

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Solution for 10x+18=5x2 equation:



10x+18=5x^2
We move all terms to the left:
10x+18-(5x^2)=0
determiningTheFunctionDomain -5x^2+10x+18=0
a = -5; b = 10; c = +18;
Δ = b2-4ac
Δ = 102-4·(-5)·18
Δ = 460
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:
$\sqrt{\Delta}=\sqrt{460}=\sqrt{4*115}=\sqrt{4}*\sqrt{115}=2\sqrt{115}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(10)-2\sqrt{115}}{2*-5}=\frac{-10-2\sqrt{115}}{-10} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(10)+2\sqrt{115}}{2*-5}=\frac{-10+2\sqrt{115}}{-10} $

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