Question

find the factor of polynomial -

Answer 1

(9x²+18xy+9y²)-z²
(3x+3y)²-z²
Using identity=a²-b²=(a+b)(a-b)

(3x+3y+z)(3x+3y-z)

Answer 2

as we know very carefully this equation this equation first three terms represent the square of 3 X + 3 y
so we can easily solve this equation
${(3 x + 3y)}^{2} - {z}^{2}$
this is a theorem a square minus b square is equal to a + b into a minus b