Question

Add-

(i) -7mn + 5, 12mn + 2, 9mn - 8, -2m - 3
(ii) 4x²y , -3xy² , -5xy², 5x²y

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Answer 1

Answer:

Group the like term

(i) [-7mn+ 12mn+9mn]+[5+2-8+3]

= 14mn + 2

(ii) 4x²y + -3xy² + 5xy² + 5x²y

Group the like terms

[4x²y + 5x²y] + [-3xy² + 5xy²]

= 9x²y + -2xy²  which can be written like

9x²y - 2xy²

Hope this helps....