(21-0.8x)(5-0.5x)=0

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Solution for (21-0.8x)(5-0.5x)=0 equation: 



(21-0.8x)(5-0.5x)=0

We add all the numbers together, and all the variables

(-0.8x+21)(-0.5x+5)=0

We multiply parentheses ..

(+0x^2+0x+0x+105)=0

We get rid of parentheses

0x^2+0x+0x+105=0

We add all the numbers together, and all the variables

x^2+2x+105=0

a = 1; b = 2; c = +105;
Δ = b2-4ac
Δ = 22-4·1·105
Δ = -416
Delta is less than zero, so there is no solution for the equation

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