Mathematics
GarnetWayner574
13

what are the exact solutions of x2 − 5x − 7 = 0? x = the quantity of negative 5 plus or minus the square root of 3 all over 2 x = the quantity of 5 plus or minus the square root of 3 all over 2 x = the quantity of negative 5 plus or minus the square root of 53 all over 2 x = the quantity of 5 plus or minus the square root of 53 all over 2

+1
(2) Answers
KatriceLaigo

x^2 - 5x - 7 = 0 x = (-b (+-) b^2 - 4ac) / 2a a = 1, b = -5, c = -7 x = (-(-5) (+-) sqrt (-5^2) -4(1)(-7)) / 2(1) x =  (5 (+-) sqrt 25 + 28) / 2 x = (5 (+-) sqrt 53) / 2

terrydavis1206

Hi friend The correct answer is : D (the last one) I hope that's help:0

Add answer