Question

What is the discriminant of 9x2 + 2 = 10x? a. -356 b.–172 c.28 d. 72

Answer 1

Answer:

What is the discriminant of 9x2 + 2 = 10x?

–356

–172

28

72

answer is 28 c

Step-by-step explanation:

Answer 2

Discriminant is 28 (c) First get the equation into the form: Ax^2 + Bx + C = 0 (the quadratic equation).. By subtracting 10x both sides (to get it on the other side).. 9x^2 + 2 = 10x 9x^2 - 10x + 2 = 10x - 10x 9x^2 - 10x + 2 = 0 Now the discriminant is: b^2 - 4ac The quadratic equation is Ax^2 + Bx + C = 0 Here, A = 9, B = -10 and C = 2 (-10)^2 - 4 (9)(2) = 100 - 4 (18) = 100 - 72 = 28