(5x - 3y)(5x + 3y) + (3x - 5y)(3x + 5y)
Expanding both terms gives:
= 25x^2 - 9y^2 + 15xy - 15xy + 9x^2 - 25y^2= 25x^2 - 9y^2 + 9x^2 - 25y^2= 34x^2 - 34y^2
So, (5x - 3y)(5x + 3y) + (3x - 5y)(3x + 5y) simplifies to 34x^2 - 34y^2.
(5x - 3y)(5x + 3y) + (3x - 5y)(3x + 5y)
Expanding both terms gives:
= 25x^2 - 9y^2 + 15xy - 15xy + 9x^2 - 25y^2
= 25x^2 - 9y^2 + 9x^2 - 25y^2
= 34x^2 - 34y^2
So, (5x - 3y)(5x + 3y) + (3x - 5y)(3x + 5y) simplifies to 34x^2 - 34y^2.