Question

factorize the following please it's urgent​

Answer 1

Answer:

Step-by-step explanation:

Given,

a square - 25a + 84

= a square - 4a - 21a + 84 [∵ 1× 84 = 84 , (-4)×(-21)= 84, ( -4 -21 = -25) ]

= a ( a - 4 ) -21 (a - 4 ) (∵ + × - = - , - × - = + )

= ( a - 4 ) ( a - 21 ) is the answer.

Answer 2

Answer:

a²-21a-4a+84

(a-21)(a-4)

Step-by-step explanation:

i hope this is helpful for you