Răspuns:
Explicație pas cu pas:
(√3)^2 + 2√3x + x^2 = (√3 + x)^2
__________
(√5)^2 + 2√15x + (√3x)^2 = (√5 + √3x)^2
__________
x^2 + 2x√2 + 2 = (x + √2)^2
__________
5 - 2√15x + 3x^2 = (√5 - √3x)^2
__________
7 - 2√7x + x^2 = (√7 - x)^2
___________
(2√5)^2 - 4√5z + z^2 = (2√5 - z)^2