Question

Помогите пожалуйста! 4х2-12х+5=0 х2+6х+5=0. x 2+ 14x + 45 = 0 x2 − 6x − 7 = 0 49t2−112t+64=0

Answer 1

4х-2-12х+5=0
Ответ 3/8

Answer 2

4x2-12x+5=0
D =144-80=64
√D=8
x=5
x=1
x2+6x+5=0
D=36-20=16
√D=4
x= -5
x= -1
x2+14x+45=0
D=196-180=16
√D=4
x= -5
x= -9
x2-6x-7=0
D=36+28=64
√D=8
x=7
x= -1