Question

Efetue:
b)√8+√15•√8-√15
c) ³√√12+2•³√√12-2
d) √2•√√10-√2•√√10+√2​

Answer 1

Resposta:

b)(√8+√15)•(√8-√15)

=√8² -√15²

=8-15=-7

c)

∛√(12+2)•∛(√12-2)

=∛(√12+2)(√12-2)

=∛(√12²-2²)

=∛(12-4)

=∛8=∛2³=2

d)

√2*√√(10-√2)*√√(10+√2)

√2*√(√(10-√2)*√(10+√2))

√2*√(√(10-√2)*(10+√2))

√2*√(√(10²-√2²))√2•√(√98)√√4•√(√98)

=√√(98*4)

=√√ 392  =392^(1/4)