84=1/2(x+1)(x+2)

Solution for 84=1/2(x+1)(x+2) equation:

84=1/2(x+1)(x+2)

We move all terms to the left:

84-(1/2(x+1)(x+2))=0


Domain of the equation: 2(x+1)(x+2))!=0

x∈R


We multiply parentheses ..

-(1/2(+x^2+2x+x+2))+84=0

We multiply all the terms by the denominator


-(1+84*2(+x^2+2x+x+2))=0


We calculate terms in parentheses: -(1+84*2(+x^2+2x+x+2)), so:

1+84*2(+x^2+2x+x+2)

determiningTheFunctionDomain
84*2(+x^2+2x+x+2)+1

Wy multiply elements

168x(++1

We use the square of the difference formula

168x(+1

Back to the equation:

-(168x(+1)


We add all the numbers together, and all the variables

-(168x1=0