math calculation using matlab

so I have this equation :

980 = 3.1396 - 0.0235*x1 - 0.2759*x2 + 0.0008*x1*x2 + 0.0001*x1^2 + 0.007*x2^2

I want to find the value of x1 and x2, but they must in this boundaries:

80 < x1 < 100

14 < x2 < 16

how we use matlab to solve the calculation? thank you.

[Jan]

Is this a homework question? What have you tried so far?

[Rudi Martin]

yes its a homework, but actually the question is more than this. Its about GA. There's a "part" that I cannot understand, even this matlab central has gave me lot of answer, but I still don't understand. so I'm trying to take this "part" out from GA area, and solve it with a different way.

for my GA's problem, I'm using matlab optimization tool only and I don't know how to use other matlab feature. So asking this question is my first try.

[dpb]

Read the intro documentation on using the Optimization Toolbox; particularly the sections on Problem Setup and Choose a Solver to get an orientation into the tools and their usage.