4x^4 - x^2 - 12x -36
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★4x^4 - x^2 - 12 x - 36
=4x^4 - ( x^2 + 12 x + 36 )
=(2x^2 )^2 - { (x)^2 + 2(x) (6) + (6)^2 }
=( 2x^2)^2 - ( x + 6 )^2
use identity: a^2 - b^2
=( a - b ) (a + b ),we get
= {2x^2 - (x + 6 ) } { 2x^2+ ( x + 6 )}
=(2x^2 - x - 6 ) ( 2x^2 + x + 6 )
★hope it helps★
=4x^4 - ( x^2 + 12 x + 36 )
=(2x^2 )^2 - { (x)^2 + 2(x) (6) + (6)^2 }
=( 2x^2)^2 - ( x + 6 )^2
use identity: a^2 - b^2
=( a - b ) (a + b ),we get
= {2x^2 - (x + 6 ) } { 2x^2+ ( x + 6 )}
=(2x^2 - x - 6 ) ( 2x^2 + x + 6 )
★hope it helps★
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