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marin [14]
3 years ago
7

Rewrite the equation by completing the square. x^2+2x-3=0 (x+_)^2=_

Mathematics
1 answer:
Natalka [10]3 years ago
3 0

Answer:

Step-by-step explanation:

I suggest you watch a video about completing the square if you're not sure what I'm doing.

1.

x^2+2x-3=0

(x^2+2x+1)-3-1=0

(x+1)^2-4=0

Hope this helped,

JoeLouis2

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If a polygon is convex, then the sum of the measures of the exterior angles, one at each vertex, is 360° .

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Step-by-step explanation:

3 0
3 years ago
How many solutions do the systems of equations have?<br> y =-1/3 x + 9<br> y =- 2/6x
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7 0
4 years ago
Please help me with this question! ASAP
spayn [35]

Hi there!

The replacement set is the set of values that may be subtituted for the variable. To find the solution set from the replacement set, you need to plug in each value frome the replacement set and evaluate both sides of the equation. If the two sides are equal, the equation is true and the value is a solution.

Here are the steps into solving this problem :

<em><u>Try 1 :</u></em>

7(0) - 3 = 18 ?

0 - 3 = 18 ?

-3 ≠ 18

<em><u>Try 2 :</u></em>

7(2) - 3 = 18 ?

14 - 3 = 18 ?

11 ≠ 18

<u><em>Try 3 :</em></u>

7(3) - 3 = 18 ?

21 - 3 = 18 ?

18 = 18

<u><em>Try 4 :</em></u>

7(4) - 3 = 18 ?

28 - 3 = 18 ?

25 ≠ 18


Your answer is : x = 3


There you go! I really hope this helped, if there's anything just let me know! :)

8 0
3 years ago
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