Question

ANSWER THIS QUESTION IN A VERY SIMPLE WAY
QUE OF CH 14 MATHS NCERT
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Answer 1

Answer:

r×r-10×r+21

r³+11

Step-by-step explanation:

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Answer 2

Answer:

multiply the 1 beside r2 and 21 then do the lcm...and then break the middle term into the lcm values...just simple..hope it helped..