Question

What are the solutions to the equation 4b^2-45=-9

Answer 1

b = ±3

Explanation:

4b^2-45=-9

Add 45 to each side

4b^2-45+45=-9+45

4b^2 = 36

Divide by 4

4b^2 = 36/4

b^2 =9

Take the square root of each side

sqrt(b^2) = sqrt(9)

b = ±3