Question

6) Calculaţi x + y şi x - y dacă:


​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

x=-2√2

y=-14√2

x-y=-2√2-(-14√2)=-2√2+14√2= 12√2

x+y=-2√2+(-14√2)=-2√2-14√2= -16√2

-

b)

x=√3

y=-2√3

x-y=√3-(-2√3)=√3+2√3=3√3

x+y=√3+3√3=4√3

-

c)

x=-9√5

y=12√5

x-y= -9√5-12√5=-21√5

x+y=-9√5+12√5=3√5

-

d)

x=2√6

y= -4√6

x-y=2√6-(-4√6)=2√6+4√6=6√6

x+y=2√6-4√6= -2√6