题目描述
Given function f(x, y) = ax*x + bxy + cy*y, check if f(x, y) ≥ 0 holds for all x, y ∈ R.Given function f(x, y) = ax*x + bxy
Given function f(x, y) = ax*x + bxy + cy*y, check if f(x, y) ≥ 0 holds for all x, y ∈ R.Given function f(x, y) = ax*x + bxy