Question

if 3 is one zero of polynomial 9x^2 -3(a-1)x+5 then find a​

Answer 1

Step-by-step explanation:

All given measurements are correct up to two decimal places. As here 5.00 mm has the smallest unit and the error in 5.00 mm is least (commonly takes as 0.01 mm if not specified), hence, 5.00 mm is most precise.

Answer 2

Step-by-step explanation:

g(x)=3

p(x)= 9x^2-3(a-1)x+5

On implying the value of g(x) on p(x) we get;

p(3) =9 (3) ^ 2 - 3 (a - 1) (3) + 5=0 (as 3 os the zero of polynomial p(x)

p(3) = 9 × 9 -3 + 3a - 3 + 5=0

p(3) = 81 - 3 + 3a +2=0

p(3)= 78 + 3a +2 = 0

p(3)= 80 +3a = 0

p(3)= 3a =0 -80

p(3)= a = -80 / 3

p(3)= a = -80

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