5xy-2yz-2zx+9xyz subtract from 9xy+5yz-7zx
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Answer:
If 5xy-2yz-2zx+9xyz subtract from 9xy+5yz-7zx we get 4xy + 3yz - 9zx + 9xyz
Step-by-step explanation:
(9xy + 5yz - 7zx) - (5xy - 2yz - 2zx + 9xyz)
Change sign and remove bracket
= 9xy + 5yz - 7zx - 5xy - 2yz - 2zx + 9xyz
Arrange like terms
= 9xy - 5xy + 5yz - 2yz - 7zx- 2zx + 9xyz
= (9-5)xy +(5 -2)yz - ( 7 + 2)zx + 9xyz
= 4xy + 3yz - 9zx + 9xyz
So, (9xy + 5yz - 7zx) - (5xy - 2yz - 2zx + 9xyz) = 4xy + 3yz - 9zx + 9xyz
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