Question

20²=
21²=
23²=
write these square in comment​

Answer 1

Given:

20²=,21²=,23²=?

To find:

Square value of given terms?

Step-by-step explanation:

• We can do the square of given terms by using the formula $(a+b)^2=a^2+b^2+2ab$

• 1)$20^2=(10+10)^2=10^2+10^2+2\times10\times10=400$

• 2)$20^2=(11+10)^2=11^2+10^2+2\times11\times10=441$
• 3)$20^2=(13+10)^2=13^2+10^2+2\times13\times10=529$

• Thus, 20²= 400,21²=441,23²=529
• .

Answer 2

ANSWERS :-

$\tt1. \: {20}^{2} = 20 \times 20 = 400$

$\tt 2.\: {21}^{2} = 21 \times 21 = 441$

$\tt 3. \: {23}^{2} = 23 \times 23 = 529$

HINT :-

Just multiply like this