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0=-0.5(t)(t-8)
We move all terms to the left:
0-(-0.5(t)(t-8))=0
We add all the numbers together, and all the variables
-(-0.5t(t-8))=0
We calculate terms in parentheses: -(-0.5t(t-8)), so:We get rid of parentheses
-0.5t(t-8)
We multiply parentheses
-0t^2-0t
We add all the numbers together, and all the variables
-1t^2-1t
Back to the equation:
-(-1t^2-1t)
1t^2+1t=0
We add all the numbers together, and all the variables
t^2+t=0
a = 1; b = 1; c = 0;
Δ = b2-4ac
Δ = 12-4·1·0
Δ = 1
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{1}=1$$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-1}{2*1}=\frac{-2}{2} =-1 $$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+1}{2*1}=\frac{0}{2} =0 $
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