5x^2+4x^2=5x*4x+84

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Solution for 5x^2+4x^2=5x*4x+84 equation: 



5x^2+4x^2=5x*4x+84

We move all terms to the left:

5x^2+4x^2-(5x*4x+84)=0

We add all the numbers together, and all the variables

9x^2-(5x*4x+84)=0

We get rid of parentheses

9x^2-5x*4x-84=0

Wy multiply elements

9x^2-20x^2-84=0

We add all the numbers together, and all the variables

-11x^2-84=0

a = -11; b = 0; c = -84;
Δ = b2-4ac
Δ = 02-4·(-11)·(-84)
Δ = -3696
Delta is less than zero, so there is no solution for the equation

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