Question

5√x-3√y=3
25x-9y=81
Determine: √x+√y
ayuda

Answer 1

Respuesta:

5✓x=3+3✓y

✓x= (3+3✓y):5

x= [(3+3✓y):5]^2

25x=81+9y

x=(81+9y):25

[(3+3✓y):5]^2=(81+9y):25

(3/5+3/5✓y)^2=81/25+9/25y

3/5+3/5y=✓81/25+9/25y

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