10f^2+70f hope this helps..
First, fint the roots of the equation
1.

2. You can see that this equation has two different real roots. Note that you can make this statement without finding roots, only knowing the value of discriminant: since D=81>0, then the equation has two different real roots.
A polyhedral is a shape that is flat and that has straight sides.
Answer:3.294. Hope this helps!
Step-by-step explanation: