Question

Solve for equation below.

Answer 1

What's the equation?

Answer 2

I just posted it up.

Answer 3

Where is the equals sign?

Answer 4

One second.

Answer 5

So 28a = 4a^3 ?

Answer 6

Yes.

Answer 7

it means simplify really
14/2a^2

Answer 8

No equals sign --> no equation to solve.
To simplify divide 28 by 4, then divide a by a^3.
When dividing powers of the same base, subtract the exponents.

Answer 9

Um...I'm confused...

Answer 10

This is just like reducing fractions before you started using variables.

If you had 28/4, you could reduce it to just 7. Or if you had 15/10, you can reduce it to 3/2.

When you add variables, the variables cancel in a similar way...

if you have:\[\frac{ a \times a \times a }{ a }\]
you can reduce it by dividing out or cancelling one "a" from the top and bottom to leave just a x a, or in other words, "a squared"

Answer 11

You have a larger exponent on the bottom.. you have a^3 on the bottom and only "a" on top, so you will end up cancelling the "a" on top with one of the a's that is on the bottom... remember, a^3 is just a * a * a.

Answer 12

Another example:
\[\frac{ a ^{2} }{ a ^{5} } = \frac{ a \times a }{ a \times a \times a \times a \times a } = \frac{ 1 }{ a ^{3} }\]

Answer 13

Is that making sense now? You essentially just reduce the fraction of numbers and variables by cancelling common number terms on top and bottom and doing the same with the variables.