Sinacosb- sinacosb+ cosasinb= cosasinb
Нули функции y=x^2-4 - (-2;2)
(х^5)^2 * х^4 / х^13=x
(-1*1/3*a*b^4*c^2)^3=-(1/27) a^3 b^12 c^6
-(-3b^3)^2 * 3b^3= -27 b^9
(6b^2-9b+4b-6)-(6b^2+9b)=6b^2-9b+4b-6-6b^2-9b=-14b-6=-2(7b+3)
<span>x+y= - 1
х²+y<span>²=1</span></span>
x=-1-y
(-1-y)^2+y^2=1
1+2y+y^2+y^2=1
2y(y+1)=0
y=0 x=-1
y=-1 x=0