If x is a whole number and 437 = (21 + x)(21 - x), then x = _____
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Answered by
8
(21+x)(21-x)=437
(21)²-(x)²=437
441-x²=437
x²=441-437
x²=4
x=2
(21)²-(x)²=437
441-x²=437
x²=441-437
x²=4
x=2
Answered by
3
437= (21+x)(21-x)
437=441-21x+21x-x^2
437-441=-x^2
x^2=4
x= 2
437=441-21x+21x-x^2
437-441=-x^2
x^2=4
x= 2
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