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Simora [160]
4 years ago
13

Find x such that 2x^2 +2x=12

Mathematics
1 answer:
solmaris [256]4 years ago
4 0

Answer:

2 and -3

Step-by-step explanation:

2x^2=4x

4x+2x=12

6x=12

how many times does 6 go into 12?

right, 2 times!

x=2

---

2x^2+2x-12=0

x^2+x-6=0

(x+3)(x-2)=0

X=-3 and 2

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Answer:

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Step-by-step explanation:

first find out how many times 39 goes into 3 by writing the multiplication facts of 3.

3x1=3             3x8=24

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3x3=9            3x10=30

3x4=12           3x11=33

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3x6=18           <u>3x13=39</u>

3x7=21           3x14=42

You use 3x13 because 3x13 equals to 39 and that is our dividend.

The answer is 13

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3 years ago
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Step-by-step explanation:

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