Question

(factories the following) a²-25a+84​

Answer 1

$= {a}^{2} - 25a - 84$

LCM of 84,1=2,2,3 and 7

$= {a}^{2} - 28a + 3a - 84$

Taking out common

= a(a - 28) + 3(a - 28)

=( a + 3)(a - 28)

Answer 2

Answer:

a*a - 25 + 84

a*a - 21a - 4a + 84

a( a-21 ) - 4( a - 21 )

( a - 4 ) ( a - 21 )