65,129 views
18 votes
18 votes
Factorise the following.​

Factorise the following.​-example-1
User Mneckoee
by
3.2k points

1 Answer

15 votes
15 votes

Answer:

iii. (p - 7)(p - 3)

iv.(x - 8)(x + 4)

Explanation:

iii. p² - 10p + 21

= p² - (7 + 3)p + 21

= p² -7p -3p + 21

= p(p - 7) - 3(p - 7)

= (p - 7)(p - 3)

iv. x² - 4x - 32

= x² - (8 - 4)x - 32

= x² - 8x + 4x - 32

= x(x - 8) + 4(x - 8)

= (x - 8)(x + 4)

User Ulrich Schwarz
by
2.5k points