how to find 20.1 square? in split method (a+b)*2 =..... etc
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5
Answer:
serach in u tube i also seen there
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It is easy to find the square of any number by splitting the number into the form of any two numbers.
Identities to help in such case:-
★ (a + b)² = a² + 2ab + b²
★ (a - b)² = a² - 2ab + b²
Similarly,
(20.1)² = (20 + 0.1)²
= (20)² + 2(20)(0.1) + (0.1)²
= 400 + 4 + 0.01
= 404.01 (Answer)
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