1. In mathematics and physics, solutions to equations that are precise and complete, without approximation or rounding
The physicist derived exact solutions to Einstein's field equations.
O físico derivou soluções exatas das equações de campo de Einstein.
2. Mathematical answers that satisfy all conditions of a problem with complete accuracy
Finding exact solutions to nonlinear differential equations is often impossible.
Encontrar soluções exatas para equações diferenciais não-lineares é frequentemente impossível.