Which pair of expressions is equivalent? a. f + g + f + g and 2(f +g) b. 2f + 4g – f – g and 2(f + g) c. 0.5f + g + 1.5f – g and 2(f + g) d. f – g + f + g and 2(f + g)

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Answer to your question: a. the fundamental theorem of algebra tells you that the equation will have two complex roots since the degree of the polynomial is 2. the roots are ​ x=1±i7√2 .number of roots=degree of polynomialhere, degree of polynomial is 2 so number of roots will be 2.hope it *_*