Answer: 3.5
Explanation:
To solve for x in a square, you need to find the value of x that makes the square equal to zero. In this case, the square is given by (6x-21), so we can solve for x by setting this expression equal to zero and then solving for x.
To solve the equation (6x-21) = 0, we can use basic algebraic techniques. First, we can add 21 to both sides of the equation to get (6x-21) + 21 = 21. Then, we can use the distributive property to expand the left-hand side of the equation as follows:
(6x-21) + 21 = 21
6x - 21 + 21 = 21
6x = 21
Finally, we can divide both sides of the equation by 6 to find the value of x that makes the square equal to zero:
6x = 21
x = 21 / 6
x = 3.5
Therefore, the value of x that makes the square (6x-21) equal to zero is x = 3.5.