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dem82 [27]
3 years ago
14

How do you factor the trinomial 3x^2+18x-21?

Mathematics
1 answer:
snow_lady [41]3 years ago
7 0

Answer:

(3)(x+7)(x-1)

Step-by-step explanation:

3x^2+18x-21

Let's start by taking 3 out of the equation.

3(x^2+6x-7)

Now, when we factor, we need to find two numbers that add up to 6 and multiply to -7.

The numbers would be 7 and -1.

So the factored form of this would be:

(3)(x+7)(x-1)

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madreJ [45]

SSS theorem: If two triangles have three pairs of sides in the same ratio, then the triangles are similar.

Write the ratio between the smallest sides, between the greatest sides and between the middle sides and compare the results:

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This gives you that

\dfrac{EF}{AB}=\dfrac{EG}{AC}=\dfrac{GF}{CB}=180.

By SSS theorem triangles ABC and EFG are similar with scale factor 180.

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3 years ago
Kylie has a loyalty card good for a 13% discount at her local hardware store. What number should she multiply the prices on the
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She gets 13 off so 100-13 =87

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I need help with this
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Convert 81/4 to a decimal
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81/4 as a decmail would be 

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