Question

The length of a rectangle is twice the width. The area is 648yd^2. Find the length and the width.

Answer 1

Do you know how to calculate the area of a rectangle? What's the formula for it?

Answer 2

A=l times w. I set it up this way. Let the length = 2w and the width = w, so with area being 648, the equation is 648=2w(w) correct?

Answer 3

That's exactly right, nice work!

Answer 4

Ok, then after I come up with 648=2w^2, I get lost!! Do I square both sides?

Answer 5

No, you first divide both sides by two to get
324=w^2

Answer 6

Now, to find w, you have to take the square root of both sides

Answer 7

Ok, then I square both sides?

Answer 8

ok let me explain a little:

Squaring sides means raising it to the power of two (multiplying by itself twice)
so, square of w is w^2

Square root means the reverse of the above. So you need to take the square root of the sides

Answer 9

Ok, so it would be the square root of 324=w

Answer 10

Exactly!