Question

Factorise x- 3x² - 9x – 5​

Answer 1

$x-3x^2-9x-5\\= -3x^2 +x-9x-5\\= -3x^2-8x-5\\=-(3x^2+8x+5)$

by splitting the middle term,

$=-(3x^2+3x+5x+5)\\=-(3x(x+1)+5(x+1))\\=-((x+1)(3x+1))\\= (-x-1)(3x+1)$

pls mark as brainliest if you find this helpful! :D it took time to write with math input :P