Determine the approach: Determine the approach to factor x2−100.We recognize that x2−100 is a difference of squares because it can be written as x2−102.
Write in the form: Write x2−100 in the form of a2−b2.x2=x×x=(x)2100=10×10=102So, x2−100=(x)2−102
Apply difference of squares formula: Apply the difference of squares formula.The difference of squares formula is a2−b2=(a−b)(a+b).Using this formula, we factor (x)2−102 into (x−10)(x+10).
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