" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
x²-4x+4+12x²-6x+12x-6-x²+9-12x²=0
2x+7=0
2x=-7
x=-7/2
x² - 4x + 4 + 3(4x² - 2x + 4x - 2) = x² - 9 + 12x²
x² - 4x + 4 + 12x² - 6x + 12x - 6 = 13x² - 9
13x² + 2x - 2 = 13x² - 9
13x² - 13x² + 2x = - 9 + 2
2x = - 7 / : 2
x = - 4,5