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(3x-1)(x+10)=0
We multiply parentheses ..
(+3x^2+30x-1x-10)=0
We get rid of parentheses
3x^2+30x-1x-10=0
We add all the numbers together, and all the variables
3x^2+29x-10=0
a = 3; b = 29; c = -10;
Δ = b2-4ac
Δ = 292-4·3·(-10)
Δ = 961
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{961}=31$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(29)-31}{2*3}=\frac{-60}{6} =-10 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(29)+31}{2*3}=\frac{2}{6} =1/3 $
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