pls do maths 7 th algebraic expertions7️
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(1) The coefficient of x² in 8 - x² is - 1.
(2) Polynomial
(3) Add
(a) (a + b - 3) + (b - a + 3) + (a - b + 3)
= a + b - 3 + b - a + 3 + a - b + 3
= a - a + a + b + b - b - 3 + 3 + 3
= a + 2b - b + 3
= a + b + 3
(b) (5m - 7n) + (3n - 4m + 2) + (2m - 3mn - 5)
= 5m - 7n + 3n - 4m + 2 + 2m - 3mn - 5
= 5m - 4m + 2m - 7n + 3n + 2 - 5 - 3mn
= 1m + 2m - 4n - 3 - 3mn
= 3m - 4n - 3 - 3mn
(c) 4x²y + (- 3xy²) + (- 5xy²) + 5x²y
= 4x²y + 5x²y - 3xy² - 5xy²
= 9x²y - 8xy²
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Bhai please help me with my maths question.
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