\( \left. \begin{array} { l } { ( m + 9 ) ( m - 3 ) } \\ { m ^ { 2 } - 12 m + 27 } \\ { m ^ { 2 } + 6 m - 27 } \\ { m ^ { 2 } - 6 m + 27 } \\ { m ^ { 2 } + 12 m - 27 } \end{array} \right. \)
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The Deep Dive
Let's dive into the world of quadratic expressions! Did you know that the expression \( (m + 9)(m - 3) \) can be expanded to reveal its standard quadratic form? If you carry out the multiplication, you'll end up with \( m^2 + 6m - 27 \), which is one of the options listed. It’s fascinating how factoring and expanding can give insight into polynomial behavior! When working with quadratics, a common mistake is to forget to apply the distributive property properly. For instance, when expanding \( (m + 9)(m - 3) \), some might incorrectly combine like terms initially or miss multiplying the last terms. Always double-check your distribution for a smooth sailing experience in algebra!