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14-08-2022
Mathematics

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3. √21 (-4√63) simply

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djp6182583 djp6182583

14-08-2022

Answer:

-84√3.

Step-by-step explanation:

√21 (-4√63)

= -4 * √21*√63

= -4 * √3√7 * √9√7

= -4 * 7*3√3

= -4 * 21√3

= -84√3.

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