НАЙДИТЕ ДИСКРИМИНАТх²-10х-11=02х²-28х-30=00,5х²-7х-16=0х²-17х-38=0х²-17-18=02х²-30х-32=0-х²+17х=02х²-36х=0х²-20х+19=0х²-20х+51=0

Найдем дискриммдиск по формуле:

D = b^2 - 4ac.

1) x^2 - 10x - 11 = 0.

D = 100 + 4 * 11 = 144.

2) x^2 - 28x - 30 = 0.

D = 784 + 4 * 30 = 904.

3) 5x^2 - 7x - 16 = 0.

D = 49 + 4 * 5 * 16 = 369.

4) x^2 - 17x - 38 = 0.

D = 289 + 4 * 38 = 441.

5) x^2 - 17x - 18 = 0.

D = 289 + 4 * 18 = 361.

6) x^2 - 30x - 32 = 0.

D = 900 + 4 * 32 = 1028.

7) -x^2 + 17x = 0.

D = 289 - 4 * (-1) * 0 = 289.

8) 2x^2 - 36x = 0.

D = 1296 - 4 * 2 * 0 = 1296.

9) x^2 - 20x + 19 = 0.

D = 400 - 4 * 1 * 19 = 324.

10) x^2 - 20x + 51 = 0.

D = 400 - 4 * 1 * 51 = 196.