USING EQUATIONS to solve WORD PROBLEMS Directions: Set up and solve an equation for 12. Find three consecutive even integers such that of the smallest integer and twice the median integer is 20 more than the largest integer.

\( \left[ \begin{array} { c c c } { 4 } \\ { 4 } & { 2 } & { - 1 } \\ { 3 } & { - 1 } & { - 1 } \\ { 1 } & { 1 } & { - 1 } \end{array} \right] * \left[ \begin{array} { c } { x _ { 1 } } \\ { x _ { 2 } } \\ { x _ { 3 } } \end{array} \right] = \left[ \begin{array} { c } { 5 } \\ { x } \\ { - 2 } \\ { 0 } \end{array} \right] \)

k. \( \left[(2 a)^{2}\right]^{3} x(2 a)^{2} \)

Q1) The last term in the expansion of \( (3-x)^{5}(3+x)^{5} \) according to the ascending powers of \( x \) is ....... \begin{tabular}{|l|l|l|l|l|l|l|}\hline (A) \( x^{5} \) & (B) \( -x^{5} \) & ( \( ) ~ \) & \( x^{10} \) & (D) \( -x^{10} \) \\ \hline\end{tabular}

If \( f:]-4,7[\longrightarrow \mathbb{R} \) where \( f(x)=x+2 \), then \( f(x) \) is negative when \( x \in \ldots \ldots \) \( \begin{array}{llll}\text { (a) }]-4,-2[ & \text { (b) }]-\infty,-2[ & \text { (c) }]-2, \infty[ & \text { (d) }]-2,7[ \end{array} \)

\( \left\{ \left. \begin{array} { l } { 2 x - 3 < ( x + 1 ) ^ { 2 } - x ( x - 1 ) } \\ { x + 3 - 2 x \geq 4 } \end{array} \right. \quad [ - 4 < x \leq - 1 ] \right. \)