Factor the polynomial. 225x^2 - 144y^2

Holt McDougal Larson Algebra 1 Common Core Edition page 545 number 8

Asked by Dee Dee on 26 Mar 09:40

Last updated by anonymous on 26 Mar 23:32

Answered by CherieS on 26 Mar 23:32

225x^2 - 144y^2

9(25x^2 -16y^2)

9 (5x )(5x ) ( +4y)( -4y)

Factor:

9(5x+4y)(5x-4y)

Check

9(5x+4y)(5x-4y)

9 (5x)(5x) (5x)(-4y) (+4y)(5x) (+4y)(-4y)

9 25x^2 -20xy +20xy -16y^2

9(25x^2-16y^2)

225x^2-144y^2