Re: Answers Check & Question

allow me to introduce you to Wolfram Alpha ...

expand (10z+5)*(z^2 - 2z+10) - Wolfram|Alpha

Re: Answers Check & Question

I've looked at Wolfram Alpha and many of what I input is not being understood. I am not sure what I am doing wrong with imputing the information? I really need to know if my answers are correct because these are being used as notes for my final tomorrow.

Re: Answers Check & Question

Quote:

Originally Posted by

**Kibbygirl** I've looked at Wolfram Alpha and many of what I input is not being understood. I am not sure what I am doing wrong with imputing the information? I really need to know if my answers are correct because these are being used as notes for my final tomorrow.

Can you show what you tried at Wolfram Alpha that would not work.

You might Look at this page..

Using those examples may give you some ideas.

Re: Answers Check & Question

the following are incorrect ...

4, 6, 7, 10, 11, and 12

9 is incomplete

$\displaystyle n^3+80n=18n^2$

$\displaystyle n^3-18n^2+80n = 0$

start by factoring out an $\displaystyle n$ , then factor the resulting quadratic factor

Re: Answers Check & Question

#10 and #12 are ones that it doesn't seem to understand and I am unsure how to put them in so it can understand them. I didn't see it on the examples page.

Re: Answers Check & Question

Ok thank you. So 1-3, 5, 8 are all incorrect?

Re: Answers Check & Question

Quote:

10. If g(t) = 2t^2+11t-10, find t such that g(t) = 11

$\displaystyle 2t^2+11t-10 = 11$

$\displaystyle 2t^2+11t-21 = 0$

factor and solve

Quote:

12. If P(y) = 1/2y -1 then find y such that P(y)= -5

$\displaystyle \frac{1}{2y} - 1 = -5$

$\displaystyle \frac{1}{2y} = -4$

$\displaystyle -\frac{1}{4} = 2y$

$\displaystyle -\frac{1}{8} = y$

Re: Answers Check & Question

Nevermind, I misread your above post.

Re: Answers Check & Question

Quote:

Originally Posted by

**Kibbygirl** #10 and #12 are ones that it doesn't seem to understand and I am unsure how to put them in so it can understand them. I didn't see it on the examples page.

Well look at this,

Re: Answers Check & Question

How would I put #7 above into the Wolfram site? This problem:

Factor:

x^{2}(y-7)^{2} + 5x(y-7)^{2 }+4(y-7)^{2}

Re: Answers Check & Question

Quote:

Originally Posted by

**Kibbygirl** How would I put #7 above into the Wolfram site? This problem:

Factor:

x^{2}(y-7)^{2} + 5x(y-7)^{2 }+4(y-7)^{2}

link ...

factor x^2(y-7)^2 + 5x(y-7)^2 +4(y-7)^2 - Wolfram|Alpha

Re: Answers Check & Question

Thanks skeeter. I typed it in but I must have had spaces in the wrong spot. For #6 above - which I see I had a typo and left off the u on the end after the second 4... --- ; uv^{2} - 4 - v^{2}+ 4u is the correct answer (u-1)(v^{2}+4)?