Question

hello guys.....
please answer step by step....
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I will follow him / Her nd mark as brainlist......
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Answer 1

Step-by-step explanation:

1. ( 4a - 5b - c ) - ( 3a + 2b - 7c )

⇨4a - 5b - c - 3a - 2b + 7c

⇨a - 7b + 6c

2. 4x² - 5x + 3 from 4x² - 3x + 2

⇨( 4x² - 3x + 2 ) - ( 4x² - 5x + 3 )

⇨4x² - 3x + 2 - 4x² + 5x - 3

⇨2x - 1

3. 4xy - 6 + y² from 5x² + 6xy - 8

⇨5x² + 6xy - 8 - ( 4xy - 6 + y² )

⇨5x² + 6xy - 8 - 4xy + 6 - y²

⇨5x² - y² + 2xy - 2

4. ( - 4x² - x + 9 ) - ( 3x² - x )

⇨- 4x² - x + 9 - 3x² + x

⇨9 - 7x²

$\: Hope \: This \: Helps \: You$

Answer 2

Step-by-step explanation:

Hy dear

please follow me and Mark as brainliest

thanks beauty