What is 5x^2 = 45

Answer 1

When solving the equation x^2 = 9, it is important to consider both the positive and negative square roots because squaring a number eliminates its sign. In this case, the square root of 9 can be either 3 or -3 since both values, when squared, result in 9. By including both the positive and negative solutions, we account for all possible values of x that satisfy the equation. This ensures that we have a comprehensive solution set and don't miss any valid solutions.

Answer 2

5x^2 =45

Divide both side by 5: x^2 = 9

Take the square root of both sides: x=3