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1/1x+1/4x=16
We move all terms to the left:
1/1x+1/4x-(16)=0
Domain of the equation: 1x!=0
x∈R
Domain of the equation: 4x!=0We calculate fractions
x!=0/4
x!=0
x∈R
4x/4x^2+x/4x^2-16=0
We multiply all the terms by the denominator
4x+x-16*4x^2=0
We add all the numbers together, and all the variables
5x-16*4x^2=0
Wy multiply elements
-64x^2+5x=0
a = -64; b = 5; c = 0;
Δ = b2-4ac
Δ = 52-4·(-64)·0
Δ = 25
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{25}=5$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-5}{2*-64}=\frac{-10}{-128} =5/64 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+5}{2*-64}=\frac{0}{-128} =0 $
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