bjr
A = (x+5)² = x² + 2*x*5 + 5² = x² + 10x + 25
B = (x-7)² = x² - 2*x*7 + 7² = x² - 14x + 49
A - B = x² + 10x + 25 - (x² - 14x + 49) = x² + 10x + 25 - x² + 14x - 49
tu peux finir
24x - 24 = 0
24x = 24
x = 1
Copyright © 2024 ELIBRARY.TIPS - All rights reserved.
Lista de comentários
bjr
A = (x+5)² = x² + 2*x*5 + 5² = x² + 10x + 25
B = (x-7)² = x² - 2*x*7 + 7² = x² - 14x + 49
A - B = x² + 10x + 25 - (x² - 14x + 49) = x² + 10x + 25 - x² + 14x - 49
tu peux finir
24x - 24 = 0
24x = 24
x = 1