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Find all real solutions to the equation below.
Choices provided in image.

Find all real solutions to the equation below. Choices provided in image.-example-1
User Yuriko
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2 Answers

1 vote
Given equation (x^2-9)(x+2)=0 ............(1)

By the zero product theorem, when the product of two factors is zero, at least one of the factors equals zero.

Therefore, the solutions of (1) are solutions of
(x^2-9)=0 and (x+2)=0

For (x^2-9)=0 factor (x+3)(x-3)=0 => x=3 or x=-3
For (x+2)=0 => x=-2

So the solution to equation (1) is S={3,-3,-2)
Which means that none of the first four answer options is correct.
User Dinoska
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8.6k points
3 votes
(x^2 - 9)(x + 2) = 0
(x - 3)(x + 3)(x + 2) = 0

As any of the 3 above factors can equal zero the solutions are

x = 3, -3 , -2.

So the answer is E.
User Vidhyanand
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7.9k points

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