cheyenned
cheyenned
12-04-2017
Mathematics
contestada
What is x^2-49? , please show work!
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SuYann
SuYann
12-04-2017
If you take the square root of x and 49 then you will get that x = 7
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irspow
irspow
12-04-2017
This is a "difference of squares" which is always factored as:
(a^2-b^2)=(a-b)(a+b) in this case:
(x-7)(x+7) that is what it is factored...
If you meant to solve for when it is equal to zero then there are two solutions:
x=±7 (x=-7 and +7)
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