Question

using suitable identity find (x+y+z)2-(x-y-z)2

Answer 1

apply the formula
${a}^{2} - {b}^{2} = (a + b)(a - b)$
a=x+y+z
b=x-y-z
therefore...,
=(x+y+z+[x-y-z])(x+y+z-[x-y-z])
=(2x)(2y+2z)
=4xy+4xz
.
.
hope it helps you...

Answer 2

Answer:

Step-by-step explanation:

a=x+y+z

b=x-y-z

therefore...,

=(x+y+z+[x-y-z])(x+y+z-[x-y-z])

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

=4xy+4xz

hope it helps