Math, asked by muskaan4854, 4 months ago

plz give it's right answer
with explanation

best answer will be mark as brainliest

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Answered by iamgojoof6eyes
1

Step-by-step explanation:

i) ab - bc + bc - ca

= ab - ca (∵ bc - bc =0)

ii) 8 - 9xy + 3x² - 5x - (3x² - 2x +5xy - 7)

= 8 - 9xy + 3x² - 5x - 3x² + 2x - 5xy + 7 (∵ '+' × '-' =  - and '-' × '-' = +)

= -14xy -3x + 15 ( 3x² - 3x² =0)

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