Question

Descompusa in produs de factori expresia (x la a doua +2x+1)+3x(x+1) este :
a)(x+1)(4x+1) b)3x(x+1) c)(x+1)(4x+2) d)(x+3) la a doua

Answer 1

( x²$+ 2x + 1 ) + 3x( x+1) = ( x+1)$² $+ 3x(x+1)$

$=>(x+1)(x+1) + 3x(x+1)$
$=>(3x+x+1)(x+1) => ( 4x+1)( x+1) -> a) .$