Question

Factorise: x^4 - 13x² + 36​

Answer 1

Answer:

(x+2)(x−2)(x+3)(x−3)

Step-by-step explanation:

Factor x4−13x2+36

x4−13x2+36

=(x+2)(x−2)(x+3)(x−3)

Answer 2

Step-by-step explanation:

${x}^{4} - 13 {x}^{2} + 36$

$= {x}^{4} - 4 {x}^{2} - 9 {x}^{2} + 36$

$= {x}^{2} ( {x}^{2} - 4) - 9( {x}^{2} - 4)$

$= ( {x}^{2} - 4)( {x}^{2} - 9)$

$= (x + 2)(x - 2)(x + 3)(x - 3)$

I hope it helps you. If you have any doubts, then don't hesitate to ask.