Monday

January 26, 2015

January 26, 2015

Posted by **Anonymous** on Wednesday, June 12, 2013 at 5:40pm.

I am unsure how to make a radical sign with the keyboard so I am using a question mark in its place.

(2?5-?28)(?28+4?5)

(?3+2?5)^2

(3?7-6?2)(7?7+?2)

(4x?y+2)(4x?y-?2)

(6?2-5?5)(3?2+2?5)

Thank you for helping.

- algebra -
**MathMate**, Wednesday, June 12, 2013 at 5:59pmFor √, type in

& r a d i c ;

but without the intervening spaces.

I will solve the first one:

Use the FOIL rule

(2√5-√28)(√28+4√5)

=(2√5-2√7)(2√7+4√5)

=4(√5-√7)(√7+2√5)

=4(10-7-√5√7)

=12-4√5√7

**Answer this Question**

**Related Questions**

math,help - Can someone explain to me the reasoning involved in each step when ...

math - A ball is thrown vertically upward with an initial velocity of 5 ft/sec ...

pre algebra - How do I figure out problems like 52 = p +(-41)? I tried doing the...

algebra1 - could you walk-through the steps to solving this problem because I am...

algebra - could someone please explain to me how -5/8 + 1/4 = -3/8? I have ...

math - Is it possible to set up a time to do a live chat with a tutor here? like...

college math - I do not understand a problem from a text book or how to solve ...

Pre-Calculus - Hi! I have three questions that I need checked over just to make ...

Algebra - Hiya. I have 7 expressions that I have been asked to simplify. I ...

Statistics - Give a brief account of the chief methods of collecting primary ...