Math, asked by Mrmaharaj, 3 months ago

pls do maths 7 th algebraic expertions7️​

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Answered by nightread
1

Answer:

(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

Answered by ansh12121
0

Step-by-step explanation:

Bhai please help me with my maths question.

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