Question

Find the smaller root for
x^2+7=15

Answer 1

subtract 7 from both sides

x^2 = 8

take the square root

\[x = \pm \sqrt{8}\]

or \[x = \pm2\sqrt{2}\]

Answer 2

the answer is -2 ?

Answer 3

hello ??

Answer 4

Do you know the quadratic formula?

Answer 5

no ?

Answer 6

if the answer is 2... there is a typo in the question... perhaps 2x^2 + 7 = 15

Answer 7

i put 2 and -2 they are both wrong

Answer 8

but the smaller is

\[x = -\sqrt{8}\]

or \[x = -2\sqrt{?}\]

they have the same value

Answer 9

oops \[x = -2\sqrt{2}\]