Question

Q16. Factorise: x² +9y² + Z² - 6xy - 6yz + 2zx​

Answer 1

Step-by-step explanation:

x² +9y² + Z² - 6xy - 6yz + 2zx

x²+(-3y)²+z²+2(x)(-3y)+2(-3y)(z)+2(x)(z)

This is in the form of (a+b+c)² where a=x

b= -3y and c=z

So it is (x-3y+z)²

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