:1) (х+2)^2=4(х+4) 2) 4(х-1)^2=(х+2)^2 3) (3х-1)^2=3(1-2х) 4) (х+3)^2=3(х+1)^2

1)x^2+4x+4=4x+16 x^2=16-4 x^2=12 x1,2=2/3 2)4(x^2-2x+1)=x^2+4x+4 4x^2-8x+4=x^2+4x+4 4x^2-12x-4x=0 x^2-4x=0 (x-2)(x+2)=0 x=2   x=-2 3)9x^2-6x+1=3-6x 9x^2-2=0 (3x- /2)(3x+/2)=0 3x=/2     3x=-/2 x=/2: 3   x=-/2: 3

bn=b1*q^(n-1)

b3=b1*q^(3-1)

5=125*q^2

q^2=0,04

q1=0,2

q2=-2

 

b6=b1*q^(6-1)=125*(0,2)^5=0,04

или

b6=b1*q^(6-1)=125*(-0,2)^5=-0,04

Pusti budet x gipotenuza x^2=(x-8)^2+(x-4)^2 x=4, x=20 viberim x=20 gipotenuza budet 20