the error is that they didnt add the exponets
to solve for the dimensions (x+7)(x+2)=66,
we can first use the foiling method to simplify the left side.
x^2 + 2x + 7x + 14 = 66
x^2 + 9x + 14 = 66
now, subtract 66 from both sides.
x^2 + 9x - 52 = 0
now, split this into two parentheses.
(x + 13)(x - 4)
since the root of -13 would give you negative values, x=4. This means that the dimensions of the rectangle are 11 and 6.
Answer:
The required form is 
.
Step-by-step explanation:
Consider the provided quadratic function.
We need to put the equation into the form 
Add and subtract 49 in order to make the above function a perfect square.
Hence, the required form is .
Divide both sides of the equation by the same term
7/100=100z/100
Simplify
Cancel the terms that are in both The numerator and the denominator
Move the variable to the left
Z=7/100
