Question

please help me to answer this q
x^{4}-3x^{2} +2

Answer 1

Answer:

let

${x}^{2} be \: y$

now you have

${y}^{2} - \: 3y \: + 2$

${y}^{2} - 2y \: - y \: + 2$

$y(y - 2) - 1(y - 2)$

$(y - 2)(y - 1)$

now change y into

${x}^{2}$

$( {x}^{2} - 2)( {x}^{2} - 1)$

$( {x}^{2} - 2)(x + 1)(x - 1)$