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Since x2 - 16 is not a question, it does not have an answer. What do you want to do with it?
- Do you want it's derivative with respect to x? That'd be 2x
- Do you want it's indefinite integral? That'd be x2/3 - 16x + C
- Do you want it's relationship with life, the universe, everything? That'd be x= ±√59
- Do you want it's factors? Those would be (x + 4) and (x - 4)
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What is a common factor of x2-16 and x2-4x?
x2 - 4
X2 - 6x - 16?
x2 - 6x - 16 = (x - 8)(x + 2)
-x2 plus 6x plus 16?
-x2 + 6x + 16 = -(x2 - 6x - 16) = -(x - 8)(x + 2) = -(8 - x)(x + 2)
How do you factor 16 plus 6x minus x2?
16 + 6x - x2 = 16 + 8x - 2x - x2 = 8*(2 + x) - x*(2 + x) = (8 - x)*(2 + x)
How do you complete the square x2 - 6x equals 16?
x2 - 6x = 16 ∴ x2 - 6x + 9 = 25 ∴ (x - 3)2 = 25 ∴ x - 3 = 25 ∴ x = 28
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