Question

1) 20x ^ 2 + 3x - 2 = 0 2) 20x ^ 2 - 17x + 3 = 0
3) 12x ^ 2 - 17x + 5 =0: 4) - x ^ 2 + 2x + 15 = 0​

Answer 1

Ответ:

1)20х²+2+3х-2=0

20х²-3х=(-2)-2=0

17х²=4

х=17:4

х=4,25

2)