" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
= 2x² + 3xy - 2xy - 3y²
= 2x² - 3y² + xy
2. (2x - 3)² = (2x -3)(2x - 3)
= 2x.2x + 2x.(-3) + (-3).2x + (-3).(-3)
= 4x² - 6x - 6x + 9
= 4x² -12x +9