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2t(t-7)=3t
We move all terms to the left:
2t(t-7)-(3t)=0
We add all the numbers together, and all the variables
-3t+2t(t-7)=0
We multiply parentheses
2t^2-3t-14t=0
We add all the numbers together, and all the variables
2t^2-17t=0
a = 2; b = -17; c = 0;
Δ = b2-4ac
Δ = -172-4·2·0
Δ = 289
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{289}=17$$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-17)-17}{2*2}=\frac{0}{4} =0 $$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-17)+17}{2*2}=\frac{34}{4} =8+1/2 $
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