Question

Which of the following could be a solution to......


`x^(2\ )=\ 400`

Answer 1

x = ±20

Step-by-step explanation:

x² = 400

Taking square root on both sides :

• √x² = √400
• x = √(20 × 20)
• x = √20²
• x = ±20

Answer 2

20, -20

Step-by-step explanation: