Solved

Multiply
- $(p+9 q)(p-9 q)$ A) $p^{2}-18 p q-81 q^{2}$ B) $p^{2}-18 q^{2}$

Question 171

Multiple Choice

Multiply.
- $(p+9 q) (p-9 q)$

A) $p^{2}-18 p q-81 q^{2}$
B) $p^{2}-18 q^{2}$
C) $p^{2}+18 p q-81 q^{2}$
D) $p^{2}-81 q^{2}$

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