What is (A+B)⁴?
You do A⁴
Next you do (A+A+A) times B which equals A³B
Next you do (A+A) times (B+B) which equals A²B²
Next you do A times (B+B+B) which equals AB³
Lastily you do B⁴
Now you put the answer together
=A⁴ + A³B + A²B² + AB³ + B⁴
Now you put the answer together
=A⁴ + A³B + A²B² + AB³ + B⁴
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