упростите
1) [tex] \frac{x-16}{ \sqrt[]{x}-4 } - \frac{x-9}{ \sqrt{x}-3} [/tex]
2) x+[tex]{( \sqrt{x-11)^{2} } [/tex] если x<11
3) [tex] \frac{x+169}{ \sqrt{-x}+13 } [/tex]
4) [tex] \frac{x-6 \sqrt{x} -7}{ \sqrt{x} +1} +7[/tex]

1(√x-4)(√x+4)/(√x-4) -(√x-3)(√x+3)/√(√x-3)=√x+4-√x-3=12x+|x-11|=x+11-x=113(√-x -13)(√x+13)/(√-x+13)=√-x-134(√x+1)(√x-7)/(√x+1) =7=√x-7+7=√xx-6√x-7√x=aa²-6a-7=0a1+a2=6 U a1*a2=-7a1=-1 U a2=7√x=-1 U √x=7