Question

Find the product by formula: (m-3) (m+3) (m²+9)​

Answer 1

Answer:

(m-3)(m+3)(m2+9)

using formula (a-b)(a+b) =a2-b2

(m)2-(3)2(m2+9)

(m2-9)(m2+9)

again usinv formula (a-b)(a+b) =a2-b2

(m2)2-(9)2

m4-81

Answer 2

Step-by-step explanation:

=Given that (m-3) (m+3) (m²+9)

➡to find (m-3) (m+3) (m²+9) by using formula..

$= (m-3) (m+3) (m²+9) \\ \\ = (m) {}^{2} - (3) {}^{2} (m {}^{2} + 9) \\ using \: (a - b)(a + b) = (a {}^{2} - b {}^{2}) formula.. \\ \\ = (m {}^{2} - 9)(m {}^{2} + 9) \\ \\ = (m {}^{2} ) {}^{2} - (9) {}^{2} \\ \\ = {m}^{4} - 81..is \: \: the \: \: answer..$