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olga2289 [7]
4 years ago
9

X squared plus 5x=126. What is X?

Mathematics
1 answer:
AleksAgata [21]4 years ago
4 0
X^2+5x=126
x^2+5x-126=0 (Get to standard form)
(x-9)(x+14)=0 (Factor)

<span>(Set each set equal to zero)</span>
x-9=0 
x=9

x+14=0
x=14

x=9 or x=-14 Here are your two answers!
Hope that helps!
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SHOW YOUR WORK!!!!!!!!!!!!!!!!!!!
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My Answer: <u>33.95</u>

Step-by-step explanation:

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so because it is subtracting we have to add.

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when added, x will cancel out, and we will be left with the answer.

x = 33.95

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3 years ago
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CaHeK987 [17]
The correct answer for this question is this one: "<span>147"</span>

Here's how to solve this problem.

Let  <span>x = number of mystery books on the shelf </span>
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Choose the one that suits your answer choices.

Here are the following choices:
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8 0
3 years ago
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