Question

when a = 4 and b = -3 , find the value of (a +b ) (a - b)​

Answer 1

The value of (a+b) (a-b) is 7

Answer 2

Answer:

The value of $(a+b)(a-b)$, when $a=4, b=-3$ is $25$.    

Step-by-step explanation:

Given : The expression is $(a+b)(a-b)$, $a=4, b=-3$

To find : The value of  $(a+b)(a-b)$.

Solution :

• The given expression is, $(a+b)(a-b)$
• The value of $a=4, b=-3$ is given.
• Put $a=4, b=-3$ in the given expression, we get

      $(a+b)(a-b)$ $=a^{2} -b^{2}$

                        = $4^{2}-(-3)^{2}$

                        = $16+9$

                        = $25$

• ∴ The value of $(a+b)(a-b)$, when $a=4, b=-3$ is $25$.