Dezembro 23, 2019

por Inger

Como você fatora $2x ^ {2} + 3x = 5$ ?

Responda:

$(x-1)(2x+5)=0$

Explicação:

$"rearrange equation into standard form"$

$rArr2x^2+3x-5=0larrcolor(blue)"in standard form"$

$"factor the quadratic using the a-c method"$

$"the factors of - 10 which sum to + 3 are + 5 and - 2"$

$2x^2-2x+5x-5=0larrcolor(blue)"split the middle term"$

$color(red)(2x)(x-1)color(red)(+5)(x-1)=0larrcolor(blue)"factor by grouping"$

$"take out a common factor "(x-1)$

$(x-1)(color(red)(2x+5))=0larrcolor(blue)"factored form"$