Răspuns:
Explicație pas cu pas:
18(x+1)² = (3√2-6)²
9·2·(x+1)²-(3√2-6)²=0 ⇒ 9·2·(x+1)²-9(√2-2)²=0
2(x+1)²-(√2-2)²=0 ⇒[√2(x+1)-(√2-2)][√2(x+1)+(√2-2)]=0
(x√2+√2-√2+2)(x√2+√2+√2-2)=0
x√2+2=0 ⇒x1=-√2
x√2+2√2-2=0 ⇒x√2=2(1-√2) ⇒x2=√2(1-√2)
