Question

7r^2=-70
-10v^2=-810

Answer 1

Explanation:

I'll focus on -10v^2=-810 and will aim to find the solution, v. Dividing both sides by -10, we get v^2 = 81, so that v = ±9 (two roots).

The other equation, 7r^2 = -70, has no real solutions.

r^2 = -70 yields r = ±i√10 (two imaginary solutions)