Question

Решите уравнения.
1)8x2 + 6x – 35 = 0
2) 9x2 – 9x – 28 = 0
3) 16x2 + 24x + 9 = 0
4) 3 + 12x2 – 13x = 0
5) 10x – 8x2 + 25 = 0
6) 6x2 – 5x – 21 = 0
7) 18x2 + 15x + 2 = 0
8) 12x2 – 11x – 15 = 0
9) 14 + 2x2 – 11x = 0
10) 30x + 9 + 25x2 = 0

Answer 1

Ответ:

1) 8x^2+6x-35=0

D=36+1120=*корень* 34

x12=--6+-34/16

x1=1.75

x2=-2.5

Объяснение: