3 years ago

Can someone please help me on this one?

Mathematics

1 answer:

hammer [34]3 years ago

3 0

I think that the answer is a increase

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Solve x2 - 8x - 9 = 0. Rewrite the equation so that it is of the form x2 + bx = c.

barxatty [35]

Answer:

x=9,-1 and $x^2+(-8)x=9$

Explanation:

we have been given with the quadratic equation $x^2-8x-9$

we compare the given quadratic equation with general quadratic equation

general quadratic is $ax^2+bx+c=0$

from given quadratic equation a=1,b= -8,c= -9

substituting these values in the formula for discriminant $D=b^{2}-4ac$

$D=(-8)^2-4(1)(-9)=100$

Now, to find the value of x

Formula is $x=\frac{-b\pm\sqrt{D}}{2a}$

Now, substituting the values we will get

$x=\frac{-(-8)\pm\sqrt{100}} {2}= \frac{8\pm10}{2}=9,-1$

And rewritting the given equation by shifting 9 to right hand side of the given equation and taking minus inside the bracket so as to convert it in the form of

$x^2+bx=c$

4 0

3 years ago

Read 2 more answers

If A = (0,2,3,4,9,11), B = {2,3,6,8,9,10) and C= {0,2,3,9), then (A-B) n(A-C) is

timofeeve [1]

Answer:

(A-B)n(A-C) ={ }

Wishing a nice day.

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2 years ago

The employees of a firm that manufactures insulation are being tested for indications of asbestos in their lungs. The firm is re

crimeas [40]

Answer:

attached below

Step-by-step explanation:

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3 years ago

If someone eats 3/4 of granola bars per week, what fraction of a box do they eat in per day ?

shepuryov [24]

Answer:

in a day (3/4)÷7=3/28

in a year (3/28)×365=39.107

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2 years ago

Help I will be marking brainliest!! A. 55.33 B. 156.16 C. 72 D. 61.16

Lena [83]

Answer:

the answer is a

Step-by-step explanation:

if you compare pm and qn pm is shorter so you see its only a little bit longer then that so its close to there.

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2 years ago