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____ [38]
3 years ago
8

Find and simplify the expression if f(x)=x^2-1. f(x-3)

Mathematics
1 answer:
kenny6666 [7]3 years ago
8 0

Answer:

Step-by-step explanation:

f(x)=x²-1

f(x-3)=(x-3)²-1

=x²-6x+9-1

=x²-6x+8

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Perform the addition or subtraction and simplify. (20 points)
pentagon [3]
You have to find the LCD or least common denominator.
In this case the LCD would be (x-6)(x+5).

Problem: x/ x-6 - 1/x+5

Step 1: multiply x-6 to the numerator and denominator of 1/x+5

1(x-6)/ (x+5)(x-6)

Step 2: multiply x+5 to the numerator and denominator of x/x-6
x(x+5)/ (x+5)(x-6)

After all that, this is how the problem should look now

x(x+5)/ (x-6)(x+5) - 1(x-6)/ (x-6)(x+5)

If you simplify this you get

x²+5x-x+6/ (x-6)(x+5)

If you subtract both 5x-x (like terms) you get

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which is the answer

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3 years ago
Linear equations word problems
Lady bird [3.3K]
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3 years ago
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How do I solve number 15
Rudik [331]
If the rectangle's area is X
then :
x+20=44
  -20   -20
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6 0
3 years ago
Two number are in the ratio 5:6 and their sum is 44 .Use z as variable
Mariulka [41]

Answer:

the numbers are 20 and 24

Step-by-step explanation:

The numbers are in the ratio 5 : 6 = 5z : 6z , where z is a multiplier

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z = 4

Hence

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8 0
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5 0
3 years ago
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