Write 6(x – 5)4 + 4(x – 5)2 + 6 = 0 in the form of a quadratic by using substitution. a. 6u2 + 4u + 6 = 0, where u = x – 5 b. 6u2 + 4u + 6 = 0, where u = (x – 5)2 c. 6u4 + 4u + 6 = 0, where u = x – 5 d.6u4 + 4u + 6 = 0, where u = (x – 5)2the answer is  b. 6u2 + 4u + 6 = 0, where u = (x – 5)2 

We are given the equation:

..........(1)

Now we have to write it in quadratic form using substitution.

The general form of quadratic equation is given by:

So let us say

.......(2)

Plugging the value of (x-5)² from equation (2) in (1),

Answer : Option B.

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation:

answer: this is not a question

step-by-step explanation: this is a answer