Answer:
D because it’s D give me brainless
Step-by-step explanation:
The scientific mathematical language barrier.
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:

Step-by-step explanation:
this is all I can find I hope it helps you out us not I'm sorry
PEMDAS
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction