Question

What is factorized form of the expression y² - 21y -72 ?​

Answer 1

Answer:

2

−

2

1

−

7

2

y^{2}-21y-72

y2−21y−72

Grouping

1

Use the sum-product pattern

2

−

2

1

−

7

2

2

+

3

−

2

4

−

7

2

2

Common factor from the two pairs

3

Rewrite in factored form

Solution

(

−

2

4

)

(

+

3

)

Answer 2

Answer:

y² - 24y + 3y -72

y(y - 24) + 3(y - 24)

(y + 3)(y - 24)