# Math Help - Grouping Expressions

1. ## Grouping Expressions

Kind of having trouble with grouping these two expressions. Can anyone help?

36x36x2 + 6x + 1

For this one I came up with: (1 - 6x2) + (6x + 1)

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And then this one, which I know I got completely wrong.

2. ## Re: Grouping Expressions

Originally Posted by wrongnmbr
Kind of having trouble with grouping these two expressions. Can anyone help?

36x36x2 + 6x + 1

For this one I came up with: (1 - 6x2) + (6x + 1) no

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And then this one, which I know I got completely wrong.
$-6x^2(6x+1) + (6x+1) = (6x+1)(-6x^2+1) = (6x+1)(1-6x^2)$

$x^{-\frac{9}{2}}(25 + 10x + x^2) = x^{-\frac{9}{2}}(x+5)^2$

3. ## Re: Grouping Expressions

Originally Posted by wrongnmbr
Kind of having trouble with grouping these two expressions. Can anyone help?

36x36x2 + 6x + 1

For this one I came up with: (1 - 6x2) + (6x + 1)

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And then this one, which I know I got completely wrong.
$\begin{array}{l} -36x^3-6x^2+6x+1\\-6x^2(6x+1)+(6x+1)\\-(6x+1)(6x^2-1) \end{array}$