1500=-4d2+20d-100

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Solution for 1500=-4d2+20d-100 equation: 



1500=-4d^2+20d-100

We move all terms to the left:

1500-(-4d^2+20d-100)=0

We get rid of parentheses

4d^2-20d+100+1500=0

We add all the numbers together, and all the variables

4d^2-20d+1600=0

a = 4; b = -20; c = +1600;
Δ = b2-4ac
Δ = -202-4·4·1600
Δ = -25200
Delta is less than zero, so there is no solution for the equation

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