[tex]~~~~~~\dfrac{a^2 -b^2 }{a+b} =12\\\\\\\implies \dfrac{(a+b)(a-b)}{(a+b)} = 12\\\\\\\implies a-b = 12\\\\[/tex]
Answer:
a - b = 12
Step-by-step explanation:
We can firstly multiply both sides by (a + b), so now we have the equation 12(a + b) = a^2 - b^2. Realizing that a^2 - b^2 is just (a + b)(a - b), we can then divide by (a + b) on both sides to get (a - b) = 12.
