Question

Efectuati:
A)2√5•(-√3-5√2+3)
B) (2√3-3√2)•(3√3+2√2)
C)(2√7-1)•(3√5-√7+2)

Answer 1

A) 2√5•(-√3-5√2+3)=
=-2√15-10√10+6√5

B) (2√3-3√2)•(3√3+2√2)=
=6×3-9√6+4√6-6×2=
=18-5√6-12=
=6-5√6

C)(2√7-1)•(3√5-√7+2) =
=6√35-3√5-2×7+√7+4√7-2=
=6√35-3√5+5√7-16