Question

Factorise
x² - 9x + 20
​

Answer 1

Answer:

(x - 5)(x - 4)

Step-by-step explanation:

${x}^{2} - 9x + 20 \\ \\ = {x}^{2} - 5x - 4x + 20 \\ \\ = x(x - 5) - 4(x - 5) \\ \\ = (x - 5)(x - 4)$