Question

Descompuneti in factori 2x la patrat+x-1?

Answer 1

$2 x^{2} +x-1= \\ =2 x^{2} -2+x+1= \\ =2( x^{2} -1)+(x+1)= \\ =2(x-1)(x+1)+(x+1)= \\ =(x+1)[2(x-1)+1]= \\ =\boxed{(x+1)(2x-1)}.$

Answer 2

x+1
2x-1
acesta e raspunsul