How do you simplify #(sqrt10+5)(sqrt10-5)#?

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Answer 1 · 2018-05-20T02:28:06

#-15#

#(sqrt10+5)(sqrt10-5)#

FOIL

#sqrt10*sqrt10 -5sqrt10 + 5sqrt10 -25#

combine like terms:

#sqrt10*sqrt10 -25#

#(sqrt10)^2 -25#

#10 -25#

#-15#