Multiply.
- $\left( x + \frac { 2 } { 9 } \right) \left( x - \frac { 2 } { 9 } \right)$
A) $x ^ { 2 } - \frac { 4 } { 81 }$
B) $x ^ { 2 } + 4 x - 9$
C) $x ^ { 2 } - 4$
D) $x ^ { 2 } - 4 x - 9$

Question

Quizplus · Accepted Answer

This is an application of the difference of squares formula, $a^2 - b^2 = (a + b)(a - b)$, where $a = x$ and $b = \frac{2}{9}$. Squaring $x$ gives $x^2$, and squaring $\frac{2}{9}$ gives $\frac{4}{81}$, resulting in $x^2 - \frac{4}{81}$.

Multiply - (x+29)(x−29)\left( x + \frac { 2 } { 9 } \right) \left( x - \frac { 2 } { 9 } \right)(x+92​)(x−92​)

Multiply
- $\left( x + \frac { 2 } { 9 } \right) \left( x - \frac { 2 } { 9 } \right)$