Which polynomial is a difference of two squares?
Which of the following polynomials represents a difference of two squares? Consider the expressions: x² + 25, x² − 25, x² − 10, and x² + 10.
4 Answers
In general, you’ve missed out the “^” sign which denotes “raised to the power”.
So all examples start with x^2 ie x squared.
Which of 10 and 25 is a square?
Which sign (+ or -) denotes “difference”?
x^2-25, because it always has to be a negative so that when you foil (first outter inner last) you can get the middle term to cancel. in this case you would get (x-5)(x+5) so you will get x^2+5x-5x-25 the middle term cancels leaving you with x^2-25.
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