Question

factorise:x³+13x²+32x+20​

Answer 1

$\longrightarrow\underline{\underline{\red{\sf{solution}}}}$

$\sf \: Factorise: {x}^{3}-3{x}^{2}-9x-5$

$\sf \implies {x}^{3} -3 {x}^{2} -9x-5$

$\implies \sf {1}^{3} - 3 \times {1}^{2} - 9 \times 1 - 5$

$\implies \sf1 - 3 \times 1 - 9 \times 1 - 5$

$\sf \implies - 1 - 3 + 9 - 5$

$\sf \implies - 9 + 9 = 0$