Factor P(z) = r³ +7x? + 15z + 12 into linear and irreducible quadratic factors with real coefficients. Let P(z) = (z +a)(z? + bx + c). Then a =

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A: Arrange given data in ascending order 1,6,9,14,15,20,22,26 here n=8=number of observation

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A: a) Mean  = n×Π            = 60×(0.65)            = 39 Standard deviation = √(n×Π×(1- Π))…

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A: The given differential equation is