Solve the Differential Equation Using the Method of Variation of Parameters

question 141

Short Answer

Solve the differential equation using the method of variation of parameters.
$$y ^ { tt } - 3 y ^ { t } = e ^ { 9 x }$$

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Definitions:

Material

Any substance or matter from which something can be made or constructed.

Density

The mass per unit volume of a substance, often measured in grams per cubic centimeter (g/cm^3) or kilograms per cubic meter (kg/m^3).

Volume

The amount of three-dimensional space occupied by an object or enclosed within a container, usually measured in cubic units.

Material

A substance or mixture of substances that constitutes an object, used in the production and manufacturing of goods or constructions.