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uranmaximum [27]
3 years ago
15

What two factors of 30 have a sum of 11?

Mathematics
2 answers:
tester [92]3 years ago
4 0
Answer is B, 5 and 6
Marta_Voda [28]3 years ago
3 0
B). 5 and 6


Because 5 x 6 = 30 and 5 + 6 = 11
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Answer:

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Step-by-step explanation:

The standard form of a quadratic equation is

ax^2 + bx + c = 0

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The quadratic formula is

x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}

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ax^2 + 2x + c = 0

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Now we have

x^2 + 2x + c = 0

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Let's look at choice A.

x^2 + 1 = 2x - 3

Subtract 2x from both sides. Add 3 to both sides.

x^2 - 2x + 4 = 0   <em>This is not it!</em>

Let's look at choice B.

x^2 - 2x - 1 = 3

Subtract 3 from both sides.

x^2 - 2x - 4 = 0     <em>This is not it!</em>

Let's look at choice C.

x^2 + 2x - 1 = 3

Subtract 3 from both sides.

x^2 + 2x - 4 = 0     <em>This is it!</em>

Answer: C. x^2 + 2x - 1 = 3

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Answers with links will be reported
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Step-by-step explanation:

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