Como você fatora: 2x ^ 2 + 7x + 3 ?
Responda:
(x+3)(2x+1)
Explicação:
"using the a-c method of factorising"
"the factors of "2xx3=6
"which sum to + 7 are + 6 and + 1""split the middle term using these factors"
rArr2x^2+6x+x+3larrcolor(blue)"factor by grouping"
=color(red)(2x)(x+3)color(red)(+1)(x+3)
"take out the common factor "(x+3)
=(x+3)(color(red)(2x+1))
rArr2x^2+7x+3=(x+3)(2x+1)