Given that real numbers satisfy and

MATHEMATICS · Subjective · A Level · Mathematics · Algebra and Functions · Algebra and Functions

Problem

Given that real numbers a,ba, b satisfy a3−6a2+15a−21=0a^3 - 6a^2 + 15a - 21 = 0 and b3−6b2+15b−7=0b^3 - 6b^2 + 15b - 7 = 0, respectively, then find the value of a+ba+b.

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