Question

Exercitiul 5 de sus. Dau coronita.

Answer 1

x la 4+2x la 3+5x la 2+2x la3+4x la4+10x+3x la2+6x+15+1 5x la 4+4x la 3+8x la 2+16x+16 toate merge date la puterea a doua (5x la 2+2x la 3+8x+4x+4) totu la a 2

Answer 2

[tex]N=(x²+2x+3)(x²+2x+5)+1. [/tex]
$n= x^{4} +4 x^{3}+8 x^{2} +20x+16$
[tex] \sqrt{ x^{4} } = x^{2} [/tex]
$\sqrt{4 x^{3} } =Da cu virgula$
$\sqrt{8 x^{2} } =Da cu virgula$
$\sqrt{20x} =Da cu virgula$
$\sqrt{16} = 4$
=> N nu poate fi patrat perfect.