Determine the zero(s), if they exist. The zero(s) is/are \( -6,-4,4 \). (Type integers or decimals. Use a comma to separate answers as needed.) Determine the multiplicities of the zero(s), if they exist. Select the correct choice below and, if necessary, fill in the answer box(es) within your choice. A. There are two zeros. The multiplicity of the smallest zero is (Simplify your answers.) The multiplicity of the largest zero is B. There are three zeros. The multiplicity of the smallest zero is (Simplify your answers.) C. There is one zero. The multiplicicity of the largest zero is of the zero is \( \square \). The multiplicity of the other zero is (Simplify your answer.)

Solve the system of equations. If the system has no solution, say that it is inconsistent. \( \begin{array}{l}x+4 y=8 \\ 6 x+24 y=48\end{array} \) Select the correct choice below and, if necessary, fill in any answer boxes within your choice. A. The solution is \( x=\square \) and \( y=\square \). Type integers or simplified fractions.) B. There are infinitely many solutions. Using ordered pairs, they can be expressed as \( \{(x, y) \mid x=\square \) y any real number \( \} \) (Simplify your answer. Thpe an expression using y as the variable as needed.) C. The system is inconsistent.

\( 1.21 . \quad \) Solve for \( x \) if \( f(x)=0 \) (correct to TwO decimal places) 1.22 Hence or, otherwise, calculate the value of \( d \) for which \( 5 x^{2}+6 x-d=0 \) has equal roots.

\( \begin{array}{ll}\text { Hipótesis } & \text { círculo }(O, r) \\ & \overline{A B} \text { y } \overline{C D} \text { cuerdas } \\ & \overline{O M} \perp \overline{A B}, \overline{O N} \perp \overline{C D} \\ & \overline{A B} \simeq \overline{C D} \\ \text { Tesis: } & O M=O N\end{array} \)

19. Desenvolupa les potències següents i troba'n el seu terme sisè: \( \begin{array}{llll}\text { a) }(3-2 \sqrt{3})^{4} & \text { b) }\left(2 x+\frac{4}{3 x}\right)^{5} & \text { c) }(\sqrt{2}-2 \sqrt{3})^{9} & \text { d) }\left(3 a^{2}+2 a b\right)^{8}\end{array} \)

1. Observe o problema matemático: "A medida do lado de um quadrado tem a área numericamente igual a área de um retângulo". \( A \) equacão polinomial do segundo grau que permite calcuar o valor da área do quadrado, " \( x \) ".