Question

4 square +5square + dash =21square

Answer 1

Answer:

12 square

Step-by-step explanation:

4sq +5sq+X =21sq

9sq+X =21sq

X=21sq-9sq

X=12sq

hope it is helpful

Answer 2

Answer:

20square

Step-by-step explanation:

Given,

4² + 5² + X = 21²

16+25+X=441

X = 441-16-25 = 400

X = 20².