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faust18 [17]
4 years ago
13

Bruno needs to solve the equation x2 + 6x – 8 = 0 by completing the square. Which pair of steps is the most efficient way to beg

in?

Mathematics
2 answers:
sp2606 [1]4 years ago
8 0
First think of the form a^2 + 2c + c^2

c in the question is clearly 3.

So we need first to add 8 for both sides to get rid of -8 and then add 9 to complete the square.

So it will be (x^2+3)^2 = 17

So the choice number 3 is the answer.

Hope this helps!
goldfiish [28.3K]4 years ago
4 0

Answer:

the third one

Step-by-step explanation:

hope this helps

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100 Points! Question Urgent!!!!!!
Ann [662]

Answer:

9

Step-by-step explanation:

<u>→You can use the Pythagorean Theorem to solve this, by plugging in the numbers, like so:</u>

<u />a^2+b^2=c^2\\x^2+(x-3)^2=(x+3)^2

x^2+x^2-6x+9=x^2+6x+9

<u>→Subtract </u>x^2-6x+9<u> from both sides:</u>

x^2 = 12x

<u>→Subtract 12x from both sides:</u>

<u />x^2 -12x=0

<u>→Factor out x:</u>

<u />x(x-12)=0

<u>→Separate, set = to 0, and solve:</u>

<u />x = 0\\x -12=0        →      <u>Add 12 to both sides:</u>        x = 12

→So we have 0 and 12, as our answers. However, we cannot have 0 as a side length, since this would not be possible.

→All we need to do is take 12, and plug it into the equation for the shortest leg.

x - 3=?\\12-3=9

3 0
3 years ago
Help and hurry !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Allushta [10]
I’m pretty sure it’s the 4th one
3 0
4 years ago
Read 2 more answers
Plz help pls help pls help pls help pls help pls help
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The correct answer is $3.18 per gallon
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