Question

solve the quadratic equation x2+9x-7=0   HELP!!!!

Answer 1

x^2 + 9x - 7 = 0
(x^2 + 9x) - 7 = 0
(x + (9/2))^2 - (81/4) - 7 = 0
(x + (9/2))^2 - 109/4 = 0
(x + (9/2))^2 = 109 / 4
x + 9/2 = sqrt(109 / 4) or = -sqrt(109 / 4)
x = -9/2 + sqrt(109 / 4) or x = -9/2 - sqrt(109 / 4)

Answer 2

value of x	20	30	40	50	60
frequency	8	12	10	12	8

compute the mean,median,modeand standard deviation for the following discrete probability distribution.                                                                                                                  

                                                                  plz give me a answer fpr this question

Answer 3

need help solving this quadratic equation 9x^2+6x+5=0

Answer 4

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Answer 5

(a+b)x^2+(a+2b+c)x+b+c=0 solve by quadratic formula