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(3q-1)(q+2)=-3
We move all terms to the left:
(3q-1)(q+2)-(-3)=0
We add all the numbers together, and all the variables
(3q-1)(q+2)+3=0
We multiply parentheses ..
(+3q^2+6q-1q-2)+3=0
We get rid of parentheses
3q^2+6q-1q-2+3=0
We add all the numbers together, and all the variables
3q^2+5q+1=0
a = 3; b = 5; c = +1;
Δ = b2-4ac
Δ = 52-4·3·1
Δ = 13
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$q_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$q_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$q_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-\sqrt{13}}{2*3}=\frac{-5-\sqrt{13}}{6} $$q_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+\sqrt{13}}{2*3}=\frac{-5+\sqrt{13}}{6} $
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