1. ( x - 7 ) ( x + 3 ) = 0
x - 7 = 0
x + 3 = 0
x1= 7
x2= - 3
( 7 - 7 ) ( -3 + 3 ) = 0
0 = 0
2. ( 4x + 3 ) ( 2x + 1) = 0
4x + 3 = 0
2x + 1 = 0
x1= 3/4 или 0,75
x2= - 1/2 или - 0,5
( 4 * 3/4 + 3 ) ( 2 * 1/2 + 1) = 0
