Question

Exercitiul e de pe pagina atasata​

Answer 1

Răspuns:

I found x=−2

Explicație pas cu pas:

Let us try squaring both sides:

[√x+6+√2−x]2=42

x+6+2√x+6√2−x+2−x=16

8+2√(x+6)(2−x)=16 taking 8 to the right:

2√(x+6)(2−x)=8 taking 2 to the right (dividing):

√(x+6)(2−x)=4

let us square again:

(x+6)(2−x)=16

2x−x2+12−6x−16=0

−x2−4x−4=0 using the Quadratic Formula we get:

x1,2=4±√16−4(−4⋅−1)−2=4±