Question

4²+5²+__²=21²

Please Tell Me
Answer​

Answer 1

Answer:

20 or(-20)

Step-by-step explanation:

4²+5⁵+x²=21²

16+25+x²=441

41+x²=441

x²=400

x=20 or(-20)

Answer 2

Answer:

x=20

Step-by-step explanation:

4²+5²+x²=21²

16+25+x²=441

41+x²=441

x²= 400

x²=20²

x=_+20

thus, x= -20

(or)20

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