plz give it's right answer
with explanation
best answer will be mark as brainliest
no spamming
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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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