1) SEJAM AS FUNCOE'S ABAIXO, FACA O ESTUDO DOS SINAIS \& OS INTERUALOS ONDE A É CRESCENTE e DECRESCENTE. A) \( y=2 x^{2}+2 x \) B) \( y=-x^{2} \) c) \( y=x^{2}-100 \) d) \( y=2 x^{2}+ \) \( 2(x+1)^{2} \)

Solve the system of quadratic inequalities: \[ \begin{array}{l}y<x^{2}-4 \\ y>-x^{2}+2\end{array} \]

The ratio of Ben's age to Ali's age is \( 3=2 \). Their total age is 140 years now What is Alils age?

Solve the system of quadratic inequalities: \[ y>x^{2}-1 \]

The polynomial of degree \( 4, P(x) \), has a root of multiplicity 2 at \( x=3 \) and roots of multiplicity 1 at \( x=0 \) and \( x=-1 \). It goes through the point \( (5,12) \). Find a formula for \( P(x) \). \( P(x)=\square \)

Which expression is equivalent to \(( x^ { \frac { 3} { 7} } ) ^ { 2} \) ?A. \(x^ { \frac { 6} { 14} } \)B. \(x^ { \frac { 17} { 7} } \)C. \(x^ { \frac { 6} { 7} } \)D. \(x^ { \frac { 5} { 7} } \)