Question

Решите пожалуйста дам 100 балов
2)x^2+7x-30=0
3)6x^2-x-1=0
4)4x^2-4x-3=0
5)2x^2-x-6=0
6)3x^2+4x-4=0
7)2x^2-2x-4=0
Решите пожалуйста дам 100Балов

Answer 1

1) x = 3 и -10 по теореме виета
2)  D = 1 + 24 = 25
x= 1 + 5/12 = 0.5
x = -4/12 = -1/3

3) 4x^2 - 4x -3=0
D = 16 + 48 = 64
x = 4 - 8 / 8 = -0.5
x = 12/8 = 1.5

4) D = 1 + 48 = 49
x = 1 - 7/ 4 = 1.5
x = 8/4 = 2

5) D = 16 + 48 = 64
x = -4-8 / 6 = -2
x = 4/6 = 2/3

6) D = 4 + 32 = 36
x = 8/4 = 2
x=-4/4 = -1