Question

Expand using identities -3x+y+z whole square

Answer 1

Answer:

using identity (a + b + c  ) ^ 2  = a^2 + b^2 + c^2  + 2ab + 2bc + 2ca

(-3x + y + z)

=>  9x^2  + y^2 + z^ 2  - 6xy + 2yz - 6xz