(1/3)^-10*(1/3)^3=((1/3)^-7)/((1/3)^-5)=(1/3)^-2=9
A+b=12
a*b=11
a=12-b
12b-b²-11=0
b²-12b+11=0
D=144-44=100
b1=(12-10)/2=1
b2= (12+10)/2=11
a1=12-1=11
a2=12-11=1
пара чисел 1 и 11
А)
y^2=0,64
y=<span>√0,64
y1=0,8
y2=-0,8
б)
y^2=77
y1=</span><span>√77
y2=-</span><span>√77</span>
x - y = - 5
- 5x + 2y = 1
y = x + 5
- 5x + 2*(x + 5) = 1
y = x + 5
- 5x + 2x + 10 = 1
y = x + 5
- 3x = - 9
x = 3
y = 8
<span>Ответ: (3;8)
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надеюсь поиог тебе
Х4+х2-2=0
х2=у
у2+у-2=0
Д=1^2-4×(-2)=9
х1=(-1)+3/2 =-4/2=-2
х2=1+3/2=2