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

1 Answer
May 18, 2018

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