Question

How do you solve `-5+ 4b ^ { 2} = 31`?

Answer 1

`b = +- 3`

Explanation:

`-5 + 4b^2 = 31`

Follow SADMEP to Solve:

SA: Subtract or Add by Opposite Action
`4b^2 = 31 + 5 = 36`

DM: Divide or Multiply by Opposite Action
`b^2 = 36/4`
`b^2 = 9`

E: Exponents by Opposite Action (so Square Root)
`b = +- sqrt(9)`
`b = +- 3`

P: Drop Paranthesis and start over at SA