Its quick i just need with this one that im stuck on

discriminent worksheet

a: -4 ex: -4m^2-3m+3=-6
+6 +6

b: -3

c: 9 .

-4m-3m+9=0

b^2-4ac

(-3)^2-4(-4)(9)

9+144

153

(i need this one solved with the work shown)

2.) -4k^2-4k+6=-4

Factor. 8x2y2 – 4x2y – 12xy 4(8x2y2 – x – 12xy) 4(2xy – 4x2y – 12xy) 4x2y2(2xy – xy –3) 4xy(2xy – x – 3)

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180