Question

Factorise : y² - 7y + 12

Answer 1

Step-by-step explanation:

${y}^{2} - 7y + 12$

$= {y}^{2} - (4 + 3)y + 12$

$= {y}^{2} - 4y - 3y + 12$

$= y(y - 4) - 3(y - 4)$

$= (y - 4)(y - 3)$