Question

x^2 + 10+21=0
solve the following using the quadratic formula
needs to be exact using radicals as needed

Answer 1

Is that typed correctly? There seems to be no 'x' term in there.

Answer 2

yes it is typed correctly

Answer 3

So it is x^2 + 21 = 0 correct?

Answer 4

no x^2 +10 +21=0

Answer 5

x^2 +10x +21=0 my mistake

Answer 6

Uh-huh I thought so
x^2 + 10x + 21 = 0
a = 1 b=10 c=21

x=-10 +-sqroot(100 - 84) / 2

x = (-10 +sqroot(16))/2

x = -10 + 4 /2

x = -3

x = (-10 -sqroot(16))/2

x = (-10 -4)/2

x = -7

Answer 7

and here is the quadratic formula: