3 х2 = 147

Solve by undoing

Answer: + / - 7

Step-by-step explanation:

3x² = 147

To solve for x divide through by three first.

3x² = 147

x² = 49, now we take the square root of both side by trying to apply laws of indices.

√x² = √49

The square root will neutralize the effect of the square because

√a = a¹/² so (x²) ¹/², and (x²) ¹/² =

x²*¹/² = x, therefore the solution is

x = + / - 7.