(7x-1)(2x-5)=0

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Solution for (7x-1)(2x-5)=0 equation:



(7x-1)(2x-5)=0
We multiply parentheses ..
(+14x^2-35x-2x+5)=0
We get rid of parentheses
14x^2-35x-2x+5=0
We add all the numbers together, and all the variables
14x^2-37x+5=0
a = 14; b = -37; c = +5;
Δ = b2-4ac
Δ = -372-4·14·5
Δ = 1089
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{1089}=33$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-37)-33}{2*14}=\frac{4}{28} =1/7 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-37)+33}{2*14}=\frac{70}{28} =2+1/2 $

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