Subject: QUADRATIC EQUATION
Name: lana
Who are you: Parent

If p and q are the roots of 2X^2 +3X+7=0, compute pq^3+qp^3.
thanks for your help .

Hi Lana,

There are expressions for finding the sum of the roots and the product of the roots that your son or daughter probably knows. Thus you can find p + p and pq. The expression you want is

pq³ + qp³ = pq(q² + p²)

Can you see how to find q² + p² if you know pq and p + q?

Penny