" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
12. (3g-5h)² = (3g-5h)(3g-5h) = (3g)² -3g.5h -5h.3g + (-5h)² = 9g² -15gh - 15gh + 25h² = 9g² - 30gh + 25h² (D)
13. (-3x-4y)² = (-3x-4y)(-3x-4y) = (-3x)² -3x(-4y) -4y(-3x) + (-4y)² = 9x² + 12xy + 12xy +16y² = 9x² + 24xy + 16y² (D).