x*x=3x-40=420

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Solution for x*x=3x-40=420 equation: 



x*x=3x-40=420

We move all terms to the left:

x*x-(3x-40)=0

Wy multiply elements

x^2-(3x-40)=0

We get rid of parentheses

x^2-3x+40=0

a = 1; b = -3; c = +40;
Δ = b2-4ac
Δ = -32-4·1·40
Δ = -151
Delta is less than zero, so there is no solution for the equation

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