Question

factorise a 12 x 4 - 4 x 12

Answer 1

A¹².y⁴ - a⁴.y¹²

you can write a¹² = a⁴.a^8
again, y¹² = y⁴.y^8

now use this,

= a⁴.a^8.y⁴ - a⁴.y⁴.y^8
you see that a⁴.y⁴ are common terms in both so,

= a⁴.y⁴( a^8 - y^8)
[ use,formula , x² - y² = (x - y)(x + y) ]

= a⁴.y⁴(a⁴ - y⁴)(a⁴ + y⁴)

=a⁴.y⁴(a² - y²)(a² + y²)(a⁴+y⁴)

=a⁴.y⁴(a - y)(a+ y)(a²+y²)(a⁴ + y⁴)

Answer 2

$<b>$HEY MATE.....!
HERE'S THE ANSWER...

To factorise: 12 x 4 - 4 x 12

= 4( 12 x 1 - 1 x 12)
= 4 x ( 12 -12)
= 4 x 0


HOPE IT HELPS

THANK YOU
-SHIVAMSHAURYA