Question

answer all question correctly with full formula​

Answer 1

Solution:

1) We need to add (-6z²+6y-18) and (7z²+9).

= -6z²+6y-18+7z²+9

= z²+6y-9

2) We need to add (4x²y²-zxy) and (-6x²y²+4xy).

= 4x²y²-zxy-6x²y²+4xy

= -2x²y²-zxy+4xy

= -xy (2xy+z-2)

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