Question

Plss answer only b

With right explaination

...........​

Answer 1

Answer:

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Answer 2

b) 12ax + 6by + 11cz - 21ax - 15by + 6cz

= -9ax - 9by + 17cz

c) 16x^3 + 14x^2 - 9x + 15 - 17x^3 + 19x^2 - 13x + 21

= -x^3 + 34x^2 - 22x + 36

$= - {x}^{3} + 34 {x}^{2} - 22x + 36$