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harina [27]
2 years ago
11

Solve x2 - 8x = 3 by completing the square. Which is the solution set

Mathematics
1 answer:
Simora [160]2 years ago
3 0

Answer:

4\pm\sqrt{19}

Step-by-step explanation:

Move everything to left side

x^{2} -8x -3 =0

Now to solve this square equation we need to find Descriminant

D=b^{2} -4ac=64+12=76

As Descriminant D is greater than 0 then we have 2 solutions which we can calculate by this formula

x_{1,2}=\frac{-b\pm\sqrt{D}}{2a} =\frac{8\pm2\sqrt{19}}{2}=4\pm\sqrt{19}

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8 0
3 years ago
NEED HELP QUICK !!!<br> Find the value of side X ?
tankabanditka [31]

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7 0
1 year ago
heather has divided $6300 between two invesments, one paying 9%, the other paying 4%. If the return on her investment is $372, h
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X + Y = 6300
X = 6300 - Y                                       (1)

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replacing X from (1) into (2)
9/100(6300-Y) + 4/100 Y = 372
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I hope this is helpful 



6 0
3 years ago
Why is the simplified value of the expression below? -8*(-3)
kirill115 [55]
When you multiply two numbers which have the same sign the answer is positive. Therefore multiply eight and three to get 24 and the answer is positive; therefor the answers 24.
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3 years ago
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