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x2-7x/9.75=0
We add all the numbers together, and all the variables
x^2-7x/9.75=0
We multiply all the terms by the denominator
x^2*9.75-7x=0
Wy multiply elements
9.75x^2-7x=0
a = 9.75; b = -7; c = 0;
Δ = b2-4ac
Δ = -72-4·9.75·0
Δ = 49
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{49}=7$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-7)-7}{2*9.75}=\frac{0}{19.5} =0 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-7)+7}{2*9.75}=\frac{14}{19.5} =14/19.5 $
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