$$b^2 + 5c = 9d$$ The given equation relates the real numbers $b$, $c…

Question

Prompt

b^{2} + 5 c = 9 d

The given equation relates the real numbers

b

c

, and

d

, where

d > 5/9 c

. Which equation correctly expresses

b

in terms of

c

and

d

b = \frac{9 d + 5 c}{2}

b = \frac{9 d - 5 c}{2}

b = \pm 9 d + 5 c

b = \pm 9 d - 5 c