Question

Calculati x•y daca :
x = 3√2 - 5√2 si y = 4√3 - 2√3​

Answer 1

Răspuns:

x= 3√2 -- 5√2

x=(3 -- 5)√2

x=-2√2

y = 4√3 -- 2√3

y=(4 -- 2)√3

y=2√3

x×y= -- 2√2×2√3=( -- 2×2)(√2×√3)= -- 4√6