12x - 4x = 8 + 3 - 3
8x = 8
X = 1
Simply the formula of an area is Length x Width
An expression is the core parts of an equation Ex. A + B
A - 11 * 3 (Expression)
B - 11 * 3x (Expression)
* = multiply (x)
Answer:
Step-by-step explanation:
Our equations are

Let us understand the term Discriminant of a quadratic equation and its properties
Discriminant is denoted by D and its formula is

Where
a= the coefficient of the 
b= the coefficient of 
c = constant term
Properties of D: If D
i) D=0 , One real root
ii) D>0 , Two real roots
iii) D<0 , no real root
Hence in the given quadratic equations , we will find the values of D Discriminant and evaluate our answer accordingly .
Let us start with

Hence we have two real roots for this equation.


Hence we do not have any real root for this quadratic

Hence D>0 and thus we have two real roots for this equation.

Hence we have one real root to this quadratic equation.
I think the answer should be 12.
12+4x^2+3x^3-2x is the answer.