Question

18²-8²solve using identiy​

Answer 1

• We have to evaluate the above expression by using the given data.

             Given data:- $18^{2} -8^{2} .$

             To find:- Value of given expression.

             Solution:-

• We know that Subtraction means taking away some value from another value.

• Subtraction is denoted by (-).

• Properties of subtraction are as follows:-

1. Subtracting a number from itself.
2. Subtracting 0 from a number.
3. Order property.
4. Subtraction of 1.

• We know the identity $a^{2} -b^{2} =(a+b)(a-b).$

        Therefore, we get

          $18^{2} -8^{2}\\=>(18+8)(18-8)\\=>26\times10\\=>260.$

    Hence we will get the value $18^{2} -8^{2} =260.$

Answer 2

Given: The equation is$18^{2} -8^{2}$.

We have to solve the above equation.

As we know that$a^{2} -b^{2} =(a+b)(a-b)$.

By using the above identity we are solving the above equation.

We are solving in the following way:

We have,

The equation is$18^{2} -8^{2}$

$=>(18+8)(18-8)\\=>(26)(10)\\=>260$

Hence, the solution of the above equation is$260$.