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lorasvet [3.4K]
3 years ago
9

Solve the equation for all values of x by completing the square. x^2+8x=9

Mathematics
1 answer:
SpyIntel [72]3 years ago
5 0

(*)\qquad(a+b)^2=a^2+2ab+b^2\\\\x^2+8x=9\\\\x^2+2\cdot x\cdot4=9\ \ \ \ |+4^2\\\\\underbrace{x^2+2\cdot x\cdot4+4^2}_{(*)}=9+4^2\\\\(x+4)^2=25\to x+4=\pm\sqrt{25}\\\\x+4=-5\ \vee\ x+4=5\ \ \ \ \ |-4\\\\x=-9\ \vee\ x=1

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Which statement correctly compares the two functions shown?
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Answer:

C.

Step-by-step explanation:

For Function 2

x=1 y=8

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8=m+b

11=2m+b

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m=3

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b=5

y=3x+5

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y=4x+5

Function 2

y=3x+5

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Function 1 has the same y-intercept and greater slope than Function 2.

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3 years ago
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Answer:

-17

Step-by-step explanation:

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3 years ago
S'y afin buys 12 cookies .He gives 3.1 of the cookies to his mother. He gives 6.1 of the cookies to his brother. a)How many cook
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Answer:

To represent parts of whole numbers, we use fractions.

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8 0
3 years ago
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I really need your help guys
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C.r b.g and a a.w those are the answers for your homework. bye peace
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Lets assume the sides of the isosceles triangle are:

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3 years ago
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