-13=5m(1+4m)-2m

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Solution for -13=5m(1+4m)-2m equation: 



-13=5m(1+4m)-2m

We move all terms to the left:

-13-(5m(1+4m)-2m)=0

We add all the numbers together, and all the variables

-(5m(4m+1)-2m)-13=0



We calculate terms in parentheses: -(5m(4m+1)-2m), so:

5m(4m+1)-2m

We add all the numbers together, and all the variables

-2m+5m(4m+1)

We multiply parentheses

20m^2-2m+5m

We add all the numbers together, and all the variables

20m^2+3m

Back to the equation:

-(20m^2+3m)



We get rid of parentheses

-20m^2-3m-13=0

a = -20; b = -3; c = -13;
Δ = b2-4ac
Δ = -32-4·(-20)·(-13)
Δ = -1031
Delta is less than zero, so there is no solution for the equation

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