sqrt(x*y)+sqr(x-1)

a) abs(sqr(x) + sqrt(x + sqr(x)))

b) (-1/2 <=sin(x)) and (sin(x)<=1/2)

a) sqrt(2*sqr(x) + abs(x))

b) (-1/2 <=cos(x)) and (cos(x)<=1/2)

a) (a+sin(x)/sqrt(sqr(a)+sqr(x)+1)

b) b) (-1 <=cos(x)) and (cos(x)<=1)

a) Sqrt(x+sqrt(x+sqrt(x)))

b) (-1 <=sin(x)) and (sin(x)<=1)

\(\dfrac{x^2+y}{y^2+x}\)-> (x*x+y)/(y*y+x)

\(x^2+\dfrac{y}{y^2}+x\) -> x*x+y/y*y+x 

x*x và y*y có thể thay thế bằng sqr(x) và sqr(y)

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( \(\sqrt{x}+3\) )/ ( x + x*\(\sqrt{x}\) )

(sqrt(x)+3)/(x+x*sqrt(x))

(x*x)/(3+y)+2+4-((a+b)*c)/(8+y)-sqr(a/b)

(x*x/3+y)+2+4-((a+b)*c/8+y)-a/b*a/b

a)
=(x-2)³
b)\(\left(2-x\right)^3\)
c)\(\left(x+\dfrac{1}{3}\right)^3\)
d)\(\left(\dfrac{x}{2}+y\right)^3\)
e)
\(=\left(x-1\right)^2\left(x-1-15\right)+25\left[3\left(x-1\right)-5\right]\)
\(=\left(x-1\right)^2\left(x-16\right)+25\left(3x-3-5\right)\)
\(=\left(x-1\right)^2\left(x-16\right)+25\left(3x-8\right)\)