which number is to substracted from a²+b² to get ( a-b)²
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Answer:
4ab is to substracted from a²+b² to get ( a-b)²
Step-by-step explanation:
a²+b² - (a-b)²
=(a+b)²-(a-b)²= (a²+b²+2ab)-(a²+b²-2ab)
= a²+b²+2ab-a²-b²+2ab
=4ab
∴4ab is to substracted from a²+b² to get ( a-b)²
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