Chapter 0: Problem 18
Perform the indicated operations and simplify. $$ 3(x-1)+4(x+2) $$
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Chapter 0: Problem 18
Perform the indicated operations and simplify. $$ 3(x-1)+4(x+2) $$
These are the key concepts you need to understand to accurately answer the question.
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The Form of an Algebraic Expression An algebraic expression may look complicated, but its 'form" is always simple; it must be a sum, a product, a quotient, or a power. For example, consider the following expressions: $$ \begin{array}{ll}{\left(1+x^{2}\right)^{2}+\left(\frac{x+2}{x+1}\right)^{3}} & {(1+x)\left(1+\frac{x+5}{1+x^{4}}\right)} \\\ {\frac{\left(5-x^{3}\right)}{1+\sqrt{1+x^{2}}}} & {\sqrt{\frac{1+x}{1-x}}}\end{array} $$ With appropriate choices for \(A\) and \(B\) , the first has the form \(A+B,\) the second \(A B\) , the third \(A / B,\) and the fourth \(A^{1 / 2}\) . Recognizing the form of an expression helps us expand, simplify, or factor it correctly. Find the form of the following algebraic expressions. $$ \begin{array}{ll}{\text { (a) } x+\sqrt{1+\frac{1}{x}}} & {\text { (b) }\left(1+x^{2}\right)(1+x)^{3}} \\ {\text { (c) } \sqrt[3]{x^{4}\left(4 x^{2}+1\right)}} & {\text { (d) } \frac{1-2 \sqrt{1+x}}{1+\sqrt{1+x^{2}}}}\end{array} $$
\(71-76\) m simplify the expression. (This type of expression arises in calculus when using the "quotient rule.") $$ \frac{(7-3 x)^{1 / 2}+\frac{3}{2} x(7-3 x)^{-1 / 2}}{7-3 x} $$
Complete the following tables. What happens to the \(n\) th root of 2 as \(n\) gets large? What about the \(n\) th root of \(\frac{1}{2} ?\) \(\begin{array}{|c|c|}\hline n & {2^{1 / n}} \\ \hline 1 & {} \\ {2} & {} \\\ {5} \\ {10} \\ {100} & {} \\ \hline\end{array}\) \(\begin{array}{|c|c|}\hline n & {\left(\frac{1}{2}\right)^{1 / n}} \\ \hline 1 & {} \\ {2} & {} \\ {5} & {} \\ {10} \\ {100} & {} \\ \hline\end{array}\) Construct a similar table for \(n^{1 / n} .\) What happens to the \(n\) th root of \(n\) as \(n\) gets large?
\(77-82\) me Rationalize the denominator. $$ \frac{y}{\sqrt{3}+\sqrt{y}} $$
Simplify the expression and eliminate any negative exponent(s). $$ \frac{\left(x^{2} y^{3}\right)^{4}\left(x y^{4}\right)^{-3}}{x^{2} y} $$
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