Discriminant of 9x2 + 2 = 10x? –356 –172 28 72

Discriminant of 9x² + 2 = 10x is:

28

Step-by-step explanation:

Discriminant(D) of a equation ax²+bx+c=0 is:

D=b²-4ac

We are given a polynomial equation:

9x² + 2 = 10x

i.e. 9x²-10x+2=0

a=9,b= -10 and c=2

D=(-10)²-4×9×2

 = 100-72

 =28

Hence, discriminant of 9x² + 2 = 10x is:

28

b

step-by-step explanation:

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: