Question

Subtarct 2xy-3yz+5xz from 16xy+7y-14zX
Pls give the full answer
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Answer 1

2 xy - 3yz + 5xz ( - ) 16 xy + 7y - 14zx

answer : 7y - 3yz - 9xz - 14xy

Answer 2

prove that point (1,1),(-2,7)and(3,_3)are collinear