Question

9x^4+12x^2y^2+4y^4 9-12(x+y)+4(x+y)^2 x^2+2x(y+z)+(y+z)^2 36

Answer 1

9x^4+12x²y²+4y^4

=(3x²)²+12x²y²+(2y²)²

=(3x²+2y²)²

9-12(x+y)+4(x+y)²

=3²-12(x+y)+[2(x+y)]²

=(2x+2y-3)²

x²+2x(y+z)+(y+z)²

=(x+y+z)²

36²+72*14+14²

=36²+2*36*14+14²

=(36+14)²

=50²

=2500