(5x-1)(5x+1)+20x^2=7x-3

Question

(5x-1)(5x+1)+20x^2=7x-3

Answer 1

( 5x - 1 )*( 5x + 1 ) + 20x² = 7x - 3 
25x² - 1 + 20x² - 7x + 3 = 0 
45x² - 7x + 2 = 0 
D = 49 - 360 = - 311
D < 0 
корней нет