Bridget M.

asked • 11/22/13

Algbrea 2 Math

9x^2-42xy+49y^2

2 Answers By Expert Tutors

By:

Jason S. answered • 11/23/13

Tutor
4.9 (116)

My goal is the success of my students. Knowledge-Patience-Honesty

See tutors like this
See tutors like this
9x^2 -42xy + 49y^2
 
 
Notice that 9x^2 = (3x)^2 and 49y^2 = (7y)^2
 
Also (3x * 7y) = 21xy which is (1/2)(42).
 
 
(3x - 7y)(3x - 7y)   or (3x - 7y)2
 
 
Double-check
Distribute...
 
(3x)(3x - 7y) - 7y(3x - 7y)
 
9x^2 - 21xy - 21xy + 49y^2
 
Combine like terms:
9x^2 -42xy + 49y^2.
Upvote • 0 Downvote
More
Report

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.