Question

URGENT! VA ROG!50 pnct..​

Answer 1

Răspuns:

Explicație pas cu pas:

Answer 2

Răspuns:

x+y=3√5+2√2+8√2-5√5

x+y=(2√2+8√2)+(3√5-5√5)

x+y=10√2-2√5

x-y=3√5+2√2-(8√2-5√5)

x-y=3√5+2√2-8√2+5√5

x-y=8√5-6√2

____________

x+y=7√3-8√6+3√3+7√6

x+y=(7√3+3√3)+(-8√6+7√6)

x+y=10√3-√6

x-y=7√3-8√6-(3√3+7√6)

x-y=7√3-8√6-3√3-7√6

x-y=4√3-15√6

___________

x+y=2√2+3√3-5√5+4√5-3√3+2√2

x+y=(2√2+2√2)+(3√3-3√3)+(-5√4+4√5)

x+y=4√2-√5

x-y=(2√2+3√3-5√5)-(4√5-3√3+2√2)

x-y=2√2+3√3-5√5-4√5+3√3-2√2

x-y=(2√2-2√2)+(3√3+3√3)+(-5√5-4√5)

x-y=6√3-9√5