I need a formula for 1 and 3. Number 2 i just can't figure out.
1. The width of a rectangle is 7 less than twice its length. If the area of the rectangle is 23 cm, what is the length of the diagonal?
Note: Your answer must be a number. It may not contain any arithmetic operations.
The length of the diagonal is _______ cm.
2.Find all possible solutions. Give your answers in increasing order. Give your answers to the nearest thousandth.
The smaller possible solution is ________. Is it a solution? (yes or no)
The larger possible solution is ________. Is it a solution? (yes or no)
3.Expand the expression using the Binomial Theorem: