Question

(a+b) (a-b) = a2 - b2​

Answer 1

Step-by-step explanation:

it is a formula

.... .,...

Answer 2

Given data: $(a+b) (a-b) = a^2 - b2^2$

To prove: The cubic formula.

Solution:

• According to the cubic formula, We can prove by LHS=RHS.
• Considering the LHS, We have $(a+b) (a-b)$ .
• Multiplying the given equation we get $(a^2-ab+ab-b^2)$ .
• In this equation -ab and +ab will be cancelled because of adding the same variable.
• After that process we have $(a^2-b^2)$.
•  Hence the given cubic equation is proved  (LHS=RHS).