Question

What are the solutions to the equation 9x2 = 49, rounded to the nearest tenth?

A.
2.3, –2.3

B.
5.4, –5.4

C.
7, –7

D.
21, –21

Answer 1

I would go for A if anything

Answer 2

A.
2.3, –2.3

Working;

`9x^(2) =49`

`x^(2) = (49)/(9)`
x=
`\sqrt{ (49)/(9) }`
x= +-2.3