Question

Calculati suma (a + b) + (b - a) in fiecare din cazurile:
a) a=2√3 - 3√5 b=3√3 + 2√5
b) a=2√2 - 4√3 b=5√2 + √3
c) a=7 - 2√14 b=5 + 3√14
d) a=3√7 - 5 b= - 4√7 -6
va roog ajutati-ma!!!!

Answer 1

a) (2√3-3√5+3√3+2√5)+(3√3+2√5-2√3+3√5)=5√3-√5+√3+5√5=6√3+4√5
b) (2√2-4√3+5√2+√3)+(5√2+√3-2√2+4√3)=7√2-3√3+3√2+5√3=10√2+2√3
c) (7-2√14+5+3√14)+(5+3√14-7+2√14)=12+√14-2+5√14=10+6√14
d) (3√7-5-4√7-6)+(-4√7-6-3√7+5)= -√7-11-7√7-1= -8√7-12