Question

expamd using sutable identitites. (x + 2y-z)^2​

Answer 1

Step-by-step explanation:

(x+2y-z)^2

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

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

x^2+2xy-zy + 2xy+4^2-2zy - zx-2zy+z^2

x^2 + 2xy + 2xy - zy - 2zy - 2zy - zx + z^2 + 4^2

x^2 + 4xy - 5zy - zx + z^2 + 4^2

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