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5 votes
Factory completely 16x2-81

2 Answers

3 votes

This is a difference of squares

presuming you mean

16x² - 81

16 is a square of 4

x² is a square of x

81 is a sqaure of 9

and since they are subtracted from each other its a difference of squares


so its

(4x + 9) (4x - 9)


User Rfusca
by
8.2k points
6 votes


16x^2-81=(4x-9)(4x+9)

User Thiiiiiking
by
8.4k points

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