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vlabodo [156]
3 years ago
7

What are the possible values for b, if x2 + bx – 9 is factorable?

Mathematics
1 answer:
Elanso [62]3 years ago
8 0

Answer:

Simplifying

x2 + bx + 9 = 0

Reorder the terms:

9 + bx + x2 = 0

Solving

9 + bx + x2 = 0

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add '-9' to each side of the equation.

9 + bx + -9 + x2 = 0 + -9

Reorder the terms:

9 + -9 + bx + x2 = 0 + -9

Combine like terms: 9 + -9 = 0

0 + bx + x2 = 0 + -9

bx + x2 = 0 + -9

Combine like terms: 0 + -9 = -9

bx + x2 = -9

Add '-1x2' to each side of the equation.

bx + x2 + -1x2 = -9 + -1x2

Combine like terms: x2 + -1x2 = 0

bx + 0 = -9 + -1x2

bx = -9 + -1x2

Divide each side by 'x'.

b = -9x-1 + -1x

Simplifying

b = -9x-1 + -1x

Step-by-step explanation:

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Step-by-step explanation:

step 1: take 7-3(both have the variable x) and subtract it.

         -a- -b= subtract then write the greater no.s sign

         +a- +b= if the 1rst number is greater than the second, subtract and give      

         or make it a positive integer. if the 1rst no. is smaller than the second,

       subtract then write the greater number's sign.

step 2: As 2-2 is 0, 2y-2y is 0

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3 0
3 years ago
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melisa1 [442]

Answer:

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Step-by-step explanation:

7 0
3 years ago
What is the volume of the cylinder?
kvv77 [185]
For this case you can use the following equation:
 d = (2 2/5) h
 Rewriting:
 d = (2.4) h
 Then, we have that the height is:
 h = 22 1/4
 Rewriting:
 h = 22.25
 Finally the diameter is:
 d = (2.4) (22.25)
 d = 53.4 feet
 The volume of the cylinder is:
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 Answer:
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6 0
3 years ago
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4 0
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What is the volume of the figure???
lianna [129]

Answer:

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Step-by-step explanation:

First figure      (9x10)x9=810

Second figure (18x10)x4=720

720+810=1530

6 0
3 years ago
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