Question

Calculati
a) 4√7-2×(2√7+√3)+√12
b) 5√15 -3×(√15+2)+4×(1-√15
c) 2×(2√3+√2)-(√8+2√12)
va rog cu tot cu rezolvare
ofer coroană

Answer 1

a) 4√7-2×(2√7+√3)+√12=
= 4√7-4√7-2√3+2√3=0

b) 5√15 -3×(√15+2)+4×(1-√15)=
= 5√15 -3√15-6+4-4√15=
= -2√15 -2=
=-2(√15+1)

c) 2×(2√3+√2)-(√8+2√12)=
= 4√3+2√2-2√2-4√3)=
= 4√3+2√2-2√2-4√3)=0