• Aug 14th 2011, 09:56 AM
anthonye
Hi;
I need to move on with simutaneous equations and need practice solving them
for quadratics anyone know where I can get practice questions on the web.

or if someone could give me some examples with answers so I can try to work them out that would be great.

Thanks.
• Aug 14th 2011, 10:11 AM
anonimnystefy
hi anthonye

• Aug 14th 2011, 10:14 AM
anthonye
Great just what I needed but I could do with more quadratics in both equations.
• Aug 14th 2011, 10:36 AM
anonimnystefy
hi anthonye

here's some more stuff:Linear-Quadratic Systems Worksheets

EDIT:sorry,didn't know you have to be a member.
• Aug 14th 2011, 05:30 PM
Prove It
Quote:

Originally Posted by anthonye
Hi;
I need to move on with simutaneous equations and need practice solving them
for quadratics anyone know where I can get practice questions on the web.

or if someone could give me some examples with answers so I can try to work them out that would be great.

Thanks.

Most quadratics will be of the form $\displaystyle y = a_1x^2 + b_1x + c_1$ and $\displaystyle y = a_2x^2 + b_2x + c_2$. Since they are both equal to $\displaystyle y$, they are equal to each other, which means

\displaystyle \begin{align*} a_1x^2 + b_1x + c_1 &= a_2x^2 + b_2x + c_2 \\ (a_1 - a_2)x^2 + (b_1 - b_2)x + c_1 - c_2 &= 0 \end{align*}

another quadratic, which you can solve using the methods you already know :)