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64x​^2-81 what’s the answer ?
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4 votes
64x​^2-81 what’s the answer ?

User Mahdi Jazini
by
4.2k points

2 Answers

5 votes

Answer:

(8x+9)(8x-9)

Explanation:

64x^2= 8x*8x

-81= 9*-9

User Smooth Reggae
by
5.5k points
6 votes

Answer:

(8x-9)(8x+9)

Explanation:

64x^2 - 81

Rewriting

(8x)^2 - 9^2

We recognize that this is the difference of squares

a^2 - b^2 = (a-b)(a+b)

(8x-9)(8x+9)

User Badjr
by
3.8k points
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