SOLUTION: can not figure out how to come to the answer to this problem... (4√5-8√2)*(2√5+4√2)please help

SOLUTION: can not figure out how to come to the answer to this problem... (4√5-8√2)*(2√5+4√2)please help

Algebra.Com

Question 585188: can not figure out how to come to the answer to this problem...
(4√5-8√2)*(2√5+4√2)please help
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!

:
FOIL, (when we multiply square roots of like terms we get rid of the radical}

:
the middle terms cancel so we have
40 - 64 = -24
RELATED QUESTIONS
I do not know how to do this problem, so your help is greatly appreciated! 4. Perform (answered by bucky)

i am asked to multiply (√[3] + 4√[5])(2√[3] �... (answered by checkley77)

Please help. Rationalize the denominator of √x+√y/√x-√y... (answered by mananth)

PLEASE PLEASE PLEASE PLEASE PLEASE HELP ME. √(2)[√(4y) - √(18)]... (answered by stanbon)

Could someone help with this radical? I am having troubles understanding how to do this? (answered by stanbon,solver91311)

(8√(5)+4√(2))(√(5)-8√(2)) (answered by stanbon)

please show me how to do this. . Rationalize the denominator: 2/√[6] �... (answered by rapaljer)

please show me how to do this. Multiply: (5√[2] + 3)(√[2] � 2√[3]) (answered by jim_thompson5910)

Can someone please assist me with this problem. (5√[2] + 2√[3])(√[2] (answered by )

multiply (8√[6] + 3√[2])(4√[6] � 5√[2]) (answered by Fombitz,stanbon)