1)2x²+x-6=0;2)x²-10x-24=0;???!!!!‍♀️​

Question

1)2x²+x-6=0;2)x²-10x-24=0;???!!!!‍♀️​

Answer 1

Ответ:

1) x1= -2

x2 = 1.5

2) x1=-2

x2= 12

Объяснение:

1) 2x² + x - 6 = 0

 D = b2 - 4ac = 12 - 4·2·(-6) = 1 + 48 = 49

x1=   -1 - √49/ 2·2  =   -1 - 7/ 4  =   -8/ 4  = -2

x2 =   -1 + √49 /2·2  =   -1 + 7 /4  =   6/ 4  = 1.5

2) x²-10x-24=0

D = b2 - 4ac = (-10)2 - 4·1·(-24) = 100 + 96 = 196

x1 =   10 - √196/ 2·1  =   10 - 14/ 2  =   -4 /2  = -2

x2 =   10 + √196/ 2·1  =   10 + 14 /2  =   24/ 2  = 12