simplify (x+y+z)(x+y-z)
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Step-by-step explanation:
x(x+y-z)+y(x+y-z)+z(x+y-z)
x²+xy-xz+xy+y²-yz+xz+yz-z²
x²+y²-z²+xy
Answer:
x^2+3xy+y^2-yz-z^2
Step-by-step explanation:
(x+y+z)(x+y-z)
= x^2+xy-xz+y^2-yz+xz+xy-z^2
= x^2+3xy+y^2-yz-z^2