Question

$(x^4 + x^3) \div x^3$
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Answer 1

x^4+x^3/x^3=x^4/x^3+x^3/x^3=x^4-3+x^3-3=x+1
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Answer 2

Factor the numerator and denominator and cancel the common factors:

(x⁴+x³)÷x³

⇒ x+1