Math, asked by shivani19485, 3 months ago

Work out the expansion of (4a - 21)^2

Answers

Answered by BoldStyle

3

( 4a - 21 ) ²

Using the identity

• ( a - b ) ² = a² - 2ab + b²

( 4a ) ² - 2 x 4a x 21 + ( 21 ) ²

16a² - 168a + 441 ➡ Answer

Answered by sumit562756k

0

Answer:

16a²-84a+441

THANKS...

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