(3x + 5)² - 8x = x(x + 9)
9x² + 30x + 25 - 8x = x² + 9x
9x² + 30x + 25 - 8x - x² - 9x = 0
8x² + 13x + 25 = 0
a = 8 , b = 13 , c = 25
(3x + 5)² - 8x = x(x + 9)
9x² + 30x + 25 - 8x = x² + 9x
9x² + 30x + 25 - 8x - x² - 9x = 0
8x² + 13x + 25 = 0
a = 8 , b = 13 , c = 25