k = 896.25

Explanation:

299.5² = 298² + k

Calculate the power

89700.25 = 88804 + k

Rearrange the variables to the left side of the equation

-k = 88804 - 89700.25

-k = -896.25

Multiply both sides by -1

k = 896.25

:)

Answer:

the complete answer is 1.5