Posted by **priya ** on Sunday, October 17, 2010 at 9:07pm.

i need help with this quretsion ; i dont know if im right, and i dontknwo what do next

question expand and simplfy:

4√7(2√3 + 3√6 - √7)

my work

= 8√21 + 12√42 -4√49

please help me

- math grade 11 -
**bobpursley**, Sunday, October 17, 2010 at 9:35pm
Yes, but the sqrt49 is widely known as 7

- math grade 11 -
**Bosnian**, Sunday, October 17, 2010 at 9:59pm
47(23+36- 7)

=4*2*7*3 +4*3*7*6 -4*7*7

=8*21 +12*42 -4*49

=8*21+ 12*(21*2) -4*7

=8*21 +12*21+ 12*2- 28

=4*2*21 +4*3*21 +4*3*2 -28

=4*21*(2+3*2)-28

## Answer this Question

## Related Questions

- math grade 11 - i need help with this quretsion ; i dont know if im right, and i...
- Math - Find an equation of the line that bisects the obtuse angles formed by the...
- Algebra - How would i complete these problems? 1. (√6mn)^5 2. ^3√16x...
- Algebra Work Check - 1. 5√6 * 1/6√216 5/6 * √1296 5/6 * √...
- maths - I will be thankfull to you if you help me to solve the below problem: 6...
- Algebra 2 Answer Check - Simplify by rationalizing each denominator. 1. 2/√...
- grade 11 math - I don't get how to do this. I'm so lost please help me. ...
- algebra 1 - alright i have a few questions if its ok..? Simplify: 1. -2√(...
- math - How would I come about to the solution and what the answers to the ...
- Math - Determine the exact value of cos 465 degrees a) √3 + √2/2 b...

More Related Questions