Question

5x^2 + 2x - 2 when x = -2​

Answer 1

• As per the data given in the question, we have to find the value of the expression.

       Given data:- $5x^{2}+2x-2. \ when\ x=-2.$

      To find:- value of the expression.

      Solution:-

• Here, we will use the below following steps to find a solution using the transposition method:
• Step 1:- we will Identify the variables and constants in the given simple equation.
• Step 2:-then we Simplify the equation in LHS and RHS.
• Step 3:- Transpose or shift the term on the other side to solve the equation further simplest.
• Step 4:- Simplify the equation using arithmetic operation as required that is mentioned in rule 1 or rule 2 of linear equations.
• Step 5:- Then the result will be the solution for the given linear equation.

     By using the transposition method. we get

     therefore,

       $=5x^{2}+2x-2\\=5(-2^{2})+2\times(-2)-2\\=5\times4-4-2\\=20-6\\=14.$

    Hence, the value will be $14.$

Answer 2

As per the data given in the question,

We have to determine the value of the expression $5x^2+2x-2$ when the value of "x = -2".

So, for determining the value of the expression,

We need to put the value of "x" in the above expression,

Thus, we will get,

$5x^2+2x-2\\=>5(-2)^2+(2\times -2)-2\\=>(5\times 4) -4-2\\=>20-4-2\\=>14$

Hence, the value of the expression $5x^2+2x-2$ when the value of "x = -2" will be 14.