Question

what is the discriminant of $9x^2 + 2 = 10x$?\
\\(\circ -356\\)\
\\(\circ -172\\)\
\\(\circ 28\\)\
\\(\circ 72\\)

Explanation:

Step1: Rearrange to standard form

$9x^2 - 10x + 2 = 0$

Step2: Identify coefficients $a,b,c$

$a=9,\ b=-10,\ c=2$

Step3: Apply discriminant formula

$\Delta = b^2 - 4ac = (-10)^2 - 4(9)(2)$

Step4: Calculate the result

$\Delta = 100 - 72 = 28$

Answer:

28 (Option C)