49=28-3x(x-3)

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Solution for 49=28-3x(x-3) equation: 



49=28-3x(x-3)

We move all terms to the left:

49-(28-3x(x-3))=0



We calculate terms in parentheses: -(28-3x(x-3)), so:

28-3x(x-3)

determiningTheFunctionDomain
-3x(x-3)+28

We multiply parentheses

-3x^2+9x+28

Back to the equation:

-(-3x^2+9x+28)



We get rid of parentheses

3x^2-9x-28+49=0

We add all the numbers together, and all the variables

3x^2-9x+21=0

a = 3; b = -9; c = +21;
Δ = b2-4ac
Δ = -92-4·3·21
Δ = -171
Delta is less than zero, so there is no solution for the equation

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