I am trying to help my daughter with her Algebra homework but I forgot how to do this kind of problem: 8x squared - 50. She has to factor the problem completely.
I factored out a 2 which left me with 2(4x^2 - 25) but what next?
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I am trying to help my daughter with her Algebra homework but I forgot how to do this kind of problem: 8x squared - 50. She has to factor the problem completely.
I factored out a 2 which left me with 2(4x^2 - 25) but what next?
That appears to be it.
There are no further common factors that I can see.
2(4X^2 - 25)
============This appears to be the fully factored expression. ( especially at the HS level )
There is another step, recognizing that 4x^2-25 is the difference of two squares. Remember that:
In this case setting a = 2x and b = 5 gives you:
^2-5^2 = (2x+5)(2x-5))
So the final answer is:
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