Question 84583
A^2+2AB-B^2
A^2-7AB+B^2
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A^4+2A^3B-A^2B^2-7A^3B-14A^2B^2+7AB^3+A^2B^2+2AB^3-B^4 NOW COMBINE LIKE TERMS.
A^4-5A^3B+9AB^3-B^4.