Question

(a) Factorise: 9x² + 4y² + 16z² +12xy – 16 yz – 24xz
(b) Factorise: (25x² - 1)+(5x+1)²​

Answer 1

Answer:

Step-by-step explanation:

A)

Using identity

(a+b-c) ²=a²+b²+c²+2ab-2ac-2bc

9x²+4y²+16z²+12xy-16yz-24xz=

(3x+2y-4z) (3x+2y-4z)

B)

(5x+1) ²=25x²+1+10x

(25x²-1) +(25x²+1+10x) =

50x²+10x=10x(5x+1)