# Pre Cal Help For Silly Girlie

1. Oct 15, 2006

### jellerboo

Write 4x^2(–2x^2 + 5x^3) in standard form. Then classify it by degree and number of terms.
a.
2x + 9x^4; quintic binomial

b.
20x^5 – 8x^4; quintic binomial

c.
2x^5 – 8x^4; quintic trinomial

d.
20x^5 – 10x^4; quartic binomial

if someone could help me change it to standard form asap that would be super
thanks!!!!

Last edited: Oct 15, 2006
2. Oct 15, 2006

why isnt it b? multiply it out.

3. Oct 15, 2006

### jellerboo

okay ill try again
i just keep getting different answers

4. Oct 15, 2006

### HallsofIvy

Staff Emeritus
Yes, it's not b: because (4)(5)= 20, not 2! And what is (4)(-2)?

Last edited: Oct 15, 2006
5. Oct 15, 2006

### jellerboo

thanks for the tips
this is my first time posting and ill try to make things easier to read
ill also try not to give up

6. Oct 15, 2006

### jellerboo

quintic binomial =]

7. Oct 15, 2006

### HallsofIvy

Staff Emeritus
Are you sure you've copied the answers correctly? "-8x^4" would make a whole lot more sense than "-8^4"!!

(You edited to make it clearer. Did the 'x' disappear when you did that?)

Last edited: Oct 16, 2006