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GuDViN [60]
3 years ago
11

How do you subtract fractions with different denominators?

Mathematics
2 answers:
Vera_Pavlovna [14]3 years ago
6 0
You find a common denominator, for example, if you want to subtract 3/4 minus 1/2 you would have to multiply 1/2 by 2/2, which equals 2/4, then you can do 3/4-2/4, which is 1/4. Sorry if it’s a bit confusing, hope it helps!
klio [65]3 years ago
6 0

Answer:

When solving fractions with different denominators, you first need to make the denominators the same.

Example:

\frac{1}{2} -\frac{1}{4}

You need to make sure the denominators are the same.

Can 2 get multiply by something and will be 4?

The answer is yes, if you multiply 2 by 2, it will change the 2 to 4. You have to multiply the equation \frac{1}{2} by  \frac{4}{4} (which is also equivalent to 1) and which change the equation to \frac{2}{4}.

And now you can subtract because the denominators are the same.

Hope this helps!

If you have any questions feel free to ask.

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(x² -7)/(2x + 1)

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Which of the following is not a factor of x^3 – 3x^2 – 4x + 12?
Slav-nsk [51]

Answer:

c. (x + 3)

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using factor theorem

if x - 3 is a factor then p(a) = 0

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p(3) = (3)^3 - 3(3)^2 - 4(3) + 12

= 27 - 27 - 12 + 12

= 0

therefore x-3 is a factor

b.(x + 2)

p(-2) = (-2)^3 - 3(-2)^2 - 4(-2) + 12

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= 0

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3 years ago
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