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(H)=3H^2+2H-4
We move all terms to the left:
(H)-(3H^2+2H-4)=0
We get rid of parentheses
-3H^2+H-2H+4=0
We add all the numbers together, and all the variables
-3H^2-1H+4=0
a = -3; b = -1; c = +4;
Δ = b2-4ac
Δ = -12-4·(-3)·4
Δ = 49
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$H_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$H_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{49}=7$$H_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-1)-7}{2*-3}=\frac{-6}{-6} =1 $$H_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1)+7}{2*-3}=\frac{8}{-6} =-1+1/3 $
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