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Given : AB = 7 cmDC = 16 cm.

Area of trapezoid = 138 cm²

Solution :

Height of Trapezoid = 12 cm

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 *_*