Posted by **Bryan** on Tuesday, December 16, 2008 at 11:28am.

Subtract..

(8x^4+5x^3-6)-(2x^2-2x+6)

I got 8x^4+5x-2x^2+2x-12

convert the number to scientific notation.

19,450,000,000

I got 1.945x10^10

- Math correct -
**gr**, Tuesday, December 16, 2008 at 11:37am
your first answer is right except the second term which should be 5x^3.

And writing in scientific notation, when moving decimal to left, exponent is negative, so correct answer will be 1.945*10^-10

- Math correct -
**gr**, Tuesday, December 16, 2008 at 11:39am
I am sorry, your scientific notation is correct. When moving decimal to left exponent is positive.

- Math correct -
**Bryan**, Tuesday, December 16, 2008 at 11:41am
1.945x10^10

or

1.945*10^-10

- Math correct -
**Bryan**, Tuesday, December 16, 2008 at 11:41am
1.945*10^-10

or

1.945x10^10

- Math correct -
**Bryan**, Tuesday, December 16, 2008 at 11:44am
1.945*10^-10

or

1.945x10^10

and 8x^4+5x^3-2x^2+2x-12

is this correct?

- Math correct -
**bobpursley**, Tuesday, December 16, 2008 at 12:08pm
yes.

- Math correct -
**gr**, Tuesday, December 16, 2008 at 12:16pm
1.945*10^10 and yes your polynomial is correct.

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