Math, asked by BTSarmysaranghe, 7 months ago

Subtract 12a² - 9ab + 10b² from 4a² - 5ab - 21b² by horizontal method.

Answers

Answered by Genius4522

2

Column method is shorter than horizontal method.

Attachments:

Answered by smitaranibehera049

3

Step-by-step explanation:

by horizon tal method

4a2-5ab-21b2-(12a2-9ab+10b2)

=4a2-5ab-21b2-12a2+9ab-10b2

=4a2-12a2-21b2-10b2-5ab+9ab

=-8a2-31b2+4ab

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