Mathematics 86 Online
OpenStudy (anonymous):

how do you expand 5(3x-1)^2 ?

OpenStudy (mathmagician):

$=5(9x^2-6x+1)=45x^2-30x+5$

OpenStudy (anonymous):

square the parens then distribute the 5

OpenStudy (anonymous):

A simple approach if you're just learning algebra is to first expand the brackets: $5(3x-1){^2}$$=5(3x-1)(3x-1)$ Then go along the equation and multiply out each term, remembering to distribute the 5: $=5\times(3x \times 3x) - 5\times 1\times 3x - 5\times 1 \times 3x + 5\times 1 \times 1$ Now begin to group like terms and simplify: $=5\times 9x{^2} - 10\times 3x + 5$$=45x{^2}-30x+5$

OpenStudy (anonymous):

First step = 5(9x^2-3x-3x+1) Second step =5(9x^2-6x+1) Third step = 45x^2-30x+5

OpenStudy (anonymous):

thanks !

Latest Questions
Har: Get you by daniel caesar (cover)
5 minutes ago 2 Replies 0 Medals
Gucchi: english help
25 minutes ago 4 Replies 0 Medals
Gucchi: english help!~
36 minutes ago 3 Replies 1 Medal
Nightmoon: Define Death
37 minutes ago 2 Replies 1 Medal
Gucchi: english HELP
52 minutes ago 9 Replies 1 Medal
Gucchi: enlgish hlep
1 hour ago 6 Replies 1 Medal
Gucchi: engliSh help*
1 hour ago 3 Replies 1 Medal
KoWoNo: Joseph's Birthday is coming up Dec. 18th!!
1 hour ago 10 Replies 3 Medals
{"found_math": true, "script_math_tex": 0, "script_math_asciimath": 0, "math_annotations": 0, "math_alttext": 0, "mathml": 0, "mathjax_tag": 0, "mathjax_inline_tex": 1, "mathjax_display_tex": 0, "mathjax_asciimath": 0, "img_math": 0, "codecogs_latex": 0, "wp_latex": 0, "mimetex.cgi": 0, "/images/math/codecogs": 0, "mathtex.cgi": 0, "katex": 0, "math-container": 0, "wp-katex-eq": 0, "align": 0, "equation": 0, "x-ck12": 0, "texerror": 0}