Question

va rog mult........ a, b, c​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

x+y = 12

(x+y) (x-y) =48

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12 (x - y) =48 ⇒(x - y) =4

x - y =4

x + y = 12

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2x / =16

x= 8

y = 4

b)

x+y = 17

(x+y) (x-y) =85

--------------------

17 (x - y) =85

x - y = 5

x + y= 17

------------

2x / = 22

x=11

y= 6

c)

x-y=6

(x - y) (x + y) = 132

--------------------------

6 (x+y) =132

x+y=22

x - y =6

------------

2x / =28

x=14

y=8

(x+y) (x-y) =48

Succes !!