Question

Factorise x³-23x²+142x-120. put x= 1 plz solved fast and sand image

Answer 1

1 - 23 + 142 - 120 =0

Answer 2

$1 \times 1 \times 1 - 23 \times 1 \times 1 + 142 \times 1 - 120$

$1 - 23 + 142 - 120$

$- 22 + 142 - 120$

$- 142 + 142$

$0$