Решите уравнения:
16-(6-11x)^2=0
(7m-13)^2-(9m+19)^2=0

16 -( 36 - 132x + 121x²) = 0
16 - 36 + 132x - 121x² =0
- 121x² + 132x - 20 = 0
121x² - 132x + 20 = 0
D = b² -4ac = 17424 - 4 ×121×20 = 17424 - 9680 = 7744 = 88²
x1 = ( 132 + 88) / 242 = 220/242 = 0,90909
x2 = (132 - 88) / 242 = 44/242 = 0,18182

2) 49m² - 182m + 169 - 81m² - 342m - 361 = 0
- 32m² - 524m - 192 = 0
8m² + 131m + 48 = 0
D = b² - 4ac = 17161 - 4×8×48 = 17161 - 1536 = 15625 = 125²
x1 = ( - 131 + 125) / 16 = - 6/16 = - 0,375
x2 = ( - 131 - 125) / 16 = - 256/16 = - 16