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Finding Square of a Number with Unit's Place 5

Question 1 iv...

Question

Question 1 (iv)
Find the squares of the following numbers:

93

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Solution

$93^{2} = (90 + 3)^{2} ⌊ ∵ (a + b)^{2} = a^{2} + 2 a b + b^{2} ⌋ = 8100 + 540 + 9 = 8649$

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Find the square roots of each of the following numbers by Division method:

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Finding Square of a Number with Unit's Place 5

Standard VIII Mathematics

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