Question

Which of the following represents "four times the square of a number is thirty-six"?

(4x) 2 = 36
4 2x = 36
4x 2 = 36

Answer 1

the answer will be 4x²...last option

Answer 2

Answer is 4x² = 36

Explanation:

Let that number be x:

`4 * x {}^(2) = 36 \\ {4x}^(2) = 36`

further more:

`{x}^(2) = (36)/(4)`

take a square root:

`\sqrt{ {x}^(2) } = \sqrt{ (36)/(4) } \\ \\ x = ( √(36) )/( √(4) ) \\ \\ x = (6)/(2) \\ \\ x = 3`