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X+1/4X=750
We move all terms to the left:
X+1/4X-(750)=0
Domain of the equation: 4X!=0We multiply all the terms by the denominator
X!=0/4
X!=0
X∈R
X*4X-750*4X+1=0
Wy multiply elements
4X^2-3000X+1=0
a = 4; b = -3000; c = +1;
Δ = b2-4ac
Δ = -30002-4·4·1
Δ = 8999984
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}$$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{8999984}=\sqrt{16*562499}=\sqrt{16}*\sqrt{562499}=4\sqrt{562499}$$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-3000)-4\sqrt{562499}}{2*4}=\frac{3000-4\sqrt{562499}}{8} $$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3000)+4\sqrt{562499}}{2*4}=\frac{3000+4\sqrt{562499}}{8} $
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