Question

factorise this y2-7y+12

Answer 1

Step-by-step explanation:

y²-7y+12

-) y²-4y-3y+12

-) (y²-4y)-(3y+12)

-) y(y-4)-3(y+4)

Ans= (y-3)(y-4).

Answer 2

y² - 7y + 12 = (y - 3)(y - 4)

Given :

The expression y² - 7y + 12

To find :

To factorise the expression

Solution :

Step 1 of 2 :

Write down the given expression

The given expression is y² - 7y + 12

Step 2 of 2 :

Factorise the expression

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

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

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

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

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

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