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jeka94
4 years ago
11

Factor completely 81x2 − 4. (6 points) (2x − 9)(2x − 9) (2x − 9)(2x + 9) (9x − 2)(9x − 2) (9x − 2)(9x + 2)

Mathematics
2 answers:
Ganezh [65]4 years ago
6 0

Answer:

(9x+2)(9x-2)

Last option is correct.

Step-by-step explanation:

The given expression is 81x^2-4

Write the expression in perfect squares

(9x)^2-2^2

Apply the difference of squares formula: a^2-b^2=(a+b)(a-b)

Here, a = 9x, b = 2

(9x)^2-2^2\\\\=(9x+2)(9x-2)

Therefore, the factored form is (9x+2)(9x-2)

Last option is correct.

Orlov [11]4 years ago
4 0
(9x-2)(9x+2)
81x^2+18x-18x-4
81x^2-4
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<h3>How would you define acceleration?</h3>

The rate at which an object's velocity with respect to time changes is referred to as acceleration in mechanics. They are vector quantities, accelerations. The direction of the net force acting on an object determines the direction of its acceleration. A point or object going straight ahead is accelerated when it accelerates or decelerates. Any alteration in an object's velocity could take the form of a change in direction of motion or a speed increase or reduction. The moon orbiting the earth, an apple falling to the ground, and a car stopped at a stop sign are a few instances of acceleration.

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