Question: How to use Explore() for multiple expressions?

Dear Sir/Madam

I want to use explore commad in order to make a plot along with calculating another expression,simultaneously.

The following command does not give the desired result:

Explore([plot(a*x^2+b*x^3,x=-2..2),evalf(a^2+b^2)],parameters = [a = -1.00..1.00, b=-1.00..1.00],placement=right );

I want to have a diagram which depends on both "a" and "b" together with evaluation of the expression "a^2+b^2" somewhere near the control markers.

I appreciate if any one could help.

Thank you very much


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