Question

find the square without actual multiplication for 39​

Answer 1

Step-by-step explanation:

Hence the square of 39 and 42 without actual multiplication is 1521 and 1764 respectively.

Answer 2

Answer:

⛧Solution

$\huge \pink{39 ^{2}}$

$= (30 + 9) ^{2} = 30(30 + 9) + 9(30 + 9)$

$= 30 ^{2} + 30 \times 9 + 9 \times 30 + 9^{2}$

$= 900 + 270 + 270 + 81$

$\longrightarrow1521$

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