Question

solve, using the square root method: 5x^2=60. Round the solution to the nearest tenth.
a.{3.5,-3.5}
b.{7.7,-7.7}
c.{3.5}
d. no real solution

Answer 1

5x² = 60
Divide left and right by 5.
x² = 12
Take the square root.
x = sqrt(12) ~ 3.46 or x = -sqrt(12) ~ -3.46
So the solution will be a.