Question

(5)What is the coefficient of x
in the expressio
n 2y + 3x + y?​

Answer 1

Step-by-step explanation:

(i) Required expression = (8a - 6ab + 5b) + (- 6a - ab - 8b) + ( - 4a + 2ab + 3b)

Collecting positive and negative like terms together, we get

8a - 6a - 4a - 6ab - ab + 2ab + 5b - 8b + 3b

= 8a - 10a - 7ab + 2ab + 8b - 8b

= - 2a - 5ab

(ii) Required expression = (5x3 + 7 + 6x - 5x2) + (2x2 - 8 - 9x) + (4x - 2x2 + 3x3) + (3x3- 9x - x2) + ( x - x2 - x3- 4)

Collecting positive and negative like terms together, we get

5x3+ 3x3 + 3x3- x3- 5x2 + 2x2 - 2x2 - x2- x2 + 6x - 9x + 4x - 9x + x + 7 - 8 - 4

= 11x3 - x3 - 7x2 + 11x - 18x + 7 - 12

= 10x3 - 7x2 - 7x - 5

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