The square of a binomial expands as follows:

Expanding all the binomials, we have

Sum like terms:

Simplify terms appearing on both sides:

Move all terms involving k to the left and all numbers to the right:

Divide both sides by -20:

The answer to this question is 360ft^2
Answer:
c cause it says length = 5x
Step-by-step explanation:
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Answer:
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Step-by-step explanation: