What is the descriminate of 9x^2+2=10x

28

Step-by-step explanation:

given a quadratic in standard form : ax² + bx + c : a ≠ 0, then

Δ = b² - 4ac ← discriminant

given 9x² + 2 = 10x ( subtract 10x from both sides )

9x² - 10x + 2 = 0 ← in standard form

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

b² - 4ac = (- 10)² - (4 × 9 × 2) = 100 - 72 = 28

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.

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