Question

explain how (a-b)² = (a+b)² - 4ab with an example where a is the squared of b ​

Answer 1

Answer:

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Answer 2

ACQ

A = B²

LETS CONSIDER B AS 2 THEN A WILL 2² = 4

NOW

(4-2)²=(4+2)² - 4×4×2

(4-2)²=(4+2)² - 32

USING 2 IDENTITIES (A+B)² AND (A-B)²

16 + 4 - 16 = 16 + 4 + 16 - 32

20 - 16 = 36 - 32

4 = 4

HENCE PROVED