Question

4x^2+81y^2+z^2-36xy+18yz-4zx​

Answer 1

Step-by-step explanation:

(-2x)^2+(9y)^2+(z)^2+2(-2x)(9y)+2(9y)(z)+2(z)(-2x)

=(-2x+9y+z)^2

==(-2x+9y+z)(-2x+9y+z)

Answer 2

Step-by-step explanation:

${4x}^{2} + {81y}^{2} + {z}^{2} - 36xy + 18yz - 4zx$

Formula -

$a {}^{2} + b {}^{2} + c {}^{2} + 2ab + 2bc + 2ca$

$(- 2x + 9y + x) {}^{2}$