Question

How do I solve Polynomial equations?

Answer 1

3.2x^3+4.8x+3.7
2.1x^3+6.3x-2.9
---------------
?

Answer 2

the sum of 2 polynomials is a polynomial ... you just add up like parts.

Answer 3

think of them as a hidden number, and the x parts determine the placement of a digit.

Answer 4

So the 3.2x^3 over 2.1x^3 part is 3.3x^9?

Answer 5

assuming that we are adding them to start with ... almost.

x^3 is a common factor; like 3a + 2a = (3+2)a, not 5a^2

Answer 6

3.2x^3 + 2.1x^3 = (3.2 + 2.1)x^3

Answer 7

but how would i write that on a graph? it's just boxes i place the digits in.

Answer 8

im not sure what you mean by that

Answer 9

can you post a picture of your problem?

Answer 10

yeah, you are just adding like parts ...

Answer 11

what is 3.2 + 2.1 ?

Answer 12

just the first part of the equation.
what would the answer look like?

Answer 13

what is 3.2 + 2.1 ?

Answer 14

5.3 lol...

Answer 15

then we can work it as:
\[3.2x^3 + 2.1x^3 = (\color{red}{3.2 + 2.1})x^3=\color{red}{5.3}x^3\]

Answer 16

ok. i think i might have it. just give me a second.

Answer 17

k

Answer 18

ok so i hav it this far. look right so far? what symbols would i use? (+/-)

Answer 19

is 6+4 a positive or negative number?

Answer 20

positive?

Answer 21

then that ones a +

is 3.7-2.9 a positive or negative number?

Answer 22

positive? 0.8

Answer 23

yes, so its a +

the operation symbol just indicates the sign of the resulting operation you did on the numbers.

a postive result gives us +
a negative result gives us -

Answer 24

Ok.
Thank you so much! It seems kinda easy now that I know how it's done. Thanks!

Answer 25

good luck :)