Question

Simplify the following (a-3)(a+3)​

Answer 1

use the formula (a - b)(a + b) = a^2-b^to simplify the product:-

${a}^{2} - {3}^{2} \\ \\ = {a}^{2} - 9$

Answer 2

ANSWER:

a^2 - 9

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EXPLANATION:

• The mathematical equation expresses that the product of sum and difference basis binomials, which contain the same terms is equal to the difference of them.
• The mathematical equation expresses that the product of sum and difference basis binomials, which contain the same terms is equal to the difference of them.It is used as a formula in mathematics. Hence, it is called an algebraic identity.

• The two binomials are sum and difference basis binomials. The involvement of these two binomials in multiplication is a special case in mathematics. Hence, the product of them is generally called as the special product of binomials or the special binomial product in algebra.