20. Subtract 3xy + 5yz - 7zx from 5xy - 2yz - 2zx + 10xyz.
1. Simplify: (1.5x - 4y) (1.5x + 4y + 3) - 4.5x + 12y...
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20. ). 5xy - 2yz - 2zx + 10xyz
- 3xy - 5yz + 7zx
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2xy - 7yz + 5zx + 10xyz
1). x² + (a+b)x + ab
= 2.25x² + 4.5x - 16y² - 12y
now on adding the rest part of question
= 2.25x² - 16y²
= (15x - 4y)(15x + 4y)
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