(4-b)*b=7

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Solution for (4-b)*b=7 equation: 



(4-b)*b=7

We move all terms to the left:

(4-b)*b-(7)=0

We add all the numbers together, and all the variables

(-1b+4)*b-7=0

We multiply parentheses

-1b^2+4b-7=0

a = -1; b = 4; c = -7;
Δ = b2-4ac
Δ = 42-4·(-1)·(-7)
Δ = -12
Delta is less than zero, so there is no solution for the equation

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