Question

Q2. Factorise the following: (4Marks)(a)x2+4y2+4z2-4xy-8yz+4xy b>x-8xy3

Answer 1

Answer:

$4xy - x2 - 4y2 + z = z2 - ( x2 + 4y2 - 4xy \\ = z2 - ( x - 2y )2 \\  = [ z - ( x - 2y )][ z + ( x - 2y )] [ ∵ a2 - b2 \\  = ( a + b )( a - b )] = [ z - x + 2y ][ z + x - 2y ].$

Answer 2

(x+y+z)²= x²+ y²+z²+2xy+2xz+2yz

here

x=√x²= x

y=√4y²=2y

z=√4z²=2z

so by identity

we can factorise that like this

(x+2y+2z) ( x+2y+2z)

please mark this as brainliest ans