Bài làm:

Ta có: \(\frac{9}{4x^2}+\frac{9y^2}{4}-\frac{9y}{2x}\)

\(=\left(\frac{3}{2x}\right)^2-2.\frac{3}{2x}.\frac{3y}{2}+\left(\frac{3y}{2}\right)^2\)

\(=\left(\frac{3}{2x}-\frac{3y}{2}\right)^2\)

dạ mk cảm ơn bạn De Bruyne nha!

DỂ QUÁ!!!!!!!!!!!!!!!!!!!!!!!!

tui hk biết làm

\(4x^2y^4-\left(3xy^2-1\right)^2\)

\(=\left(2xy^2-3xy^2+1\right)\left(2xy^2+3xy^2-1\right)\)

\(=\left(1-xy^2\right)\left(5xy^2-1\right)\)

p/s: chúc bạn học tốt

\(x^2y^2-u^4v^6\)

\(=\left(xy-u^2v^3\right)\left(xy+u^2v^3\right)\)

p/s: chúc bạn học tốt

DỂ QUÁ!!!!!!!!!!!!!!!!!!!!!!!!

tui hk biết làm

\(25x^2y^4+30xy^2z+9x^2\)

\(=\left(5xy^2\right)^2+2.5xy^2.3z+\left(3z\right)^2\)

\(=\left(5xy^2+3z\right)^2\)

Tham khảo nhé~

25x²y⁴ + 30xy²z + 9z²

=(5xy²)² + 2.(5xy²).(3z) + (3z)²

=(5xy²+3z)²

^{K MK NHA !}

\(a.x^2-4x+4+y^2+2y+1\)

\(=\left(x-2\right)^2+\left(y+1\right)^2\)

\(b.x^2+10x+25+x^2-2xy+y^2\)

\(=\left(x+5\right)^2+\left(x-y\right)^2\)

\(A=4x^2+2x^2-4xz-2z+1\)

\(=\left(4x^2-4xz+z^2\right)+\left(z^2-2z+1\right)\)

\(=\left(2x-z\right)^2+\left(z-1\right)^2\)

p/s: chúc bạn học tốt

\(4\left(x^2+2x+1\right)-12x-3=4x^2+8x+4-12x-3\)

\(=4x^2-4x+1=\left(2x-1\right)^2\)

giúp mị với mọi người ơi =(( 

a/\(x^2-2x\left(y+2\right)+y^2+4y+4=x^2-2x\left(y+2\right)+\left(y+2\right)^2=\left(x-y-2\right)^2\)

b/\(x^2+2x\left(y+1\right)+y^2+2y+1=x^2+2x\left(y+1\right)+\left(y+1\right)^2=\left(x+y+1\right)^2\)