sqrt((sqrt(3)+4)^2)+sqrt((4-sqrt(3)^2)=sqrt(3)+4+4-sqrt(3)=8
(1-sinx)/cosx - cosx/(1+sinx)=(((1-sinx)(1+sinx))-cosˇ2 x)/(cosx.(1+sinx))=
=(1-sinˇ2x-cosˇ2x)/(cosx.(1+sinx))=(cosˇ2x -cosˇ2x)/(cosx.(1+sinx))=0
Ответ:
-2(x - 5) + 3(x - 4) = 4x + 1
-2x + 10 + 3x - 12 = 4x + 1
-2x + 3x - 4x = 1 - 10 + 12
-3x = 3
x = 3/-3
x = -1
1)x-y+cy-cx
x(1-c)-y(1-c)
(1-c)(x-y)
2)(6a-7b)(6a+7b)
3)(x-4y)(x+4y)
(10-y)(100+20y+y^2)