Question

Calculati:
a) (2√3-3)(√3+1)
b) (√27-4)+(3√3+4)
c) (√2+1)²+2√8
d) (√5-2)²+4(√5-1)

Answer 1

a) (2√3-3)(√3+1)=2×3-3√3+2√3-3=3-√3

b) (√27-4)+(3√3+4)=3√3-4+3√3+4=6√3

c) (√2+1)²+2√8=2+2√2+1+4√2=3+6√2=3(1+2√2)

d) (√5-2)²+4(√5-1)=5+4-4√5+4√5-4=5