Answer:
x² + 18x +81
x² - 14x +49
4x²- 4x - 1
Step-by-step explanation:
multiply the x in the first parentheses by x and 9 in the other parentheses and
multiply the 9 in the first parentheses by x and 9 in the other parentheses and add all together
(x+9)(x+9)
x² + 9x + 9x + 81
x² + 18x +81
multiply the x in the first parentheses by x and -7 in the other parentheses and multiply the -7 in the first parentheses by x and -7 in the other parentheses and add all together
(x-7)(x-7)
x² -7x - 7x +49
x² - 14x +49
(2x-1)² is the same as (2x-1)(2x-1)
multiply the 2x in the first parentheses by 2x and -1 in the other parentheses and multiply the -1 in the first parentheses by 2x and -1 in the other parentheses and add all together
(2x-1)(2x-1)
4x²-2x-2x+1
4x²- 4x - 1
The center points , so the ones with a full line divide by 2
Answer:

Dimensions of rectangle are
W=14 and L = 3
Step-by-step explanation:
Are of rectangle is
--------(1)
Where W is width and L is length of rectangle
Here
A=60
W=x+9
L=x-2
Substituting values in equation (1)



Using quadratic formula

Here a=1, b=7 and C=-78
(Here +/- = ±)





x cannot be negative (Negative x means -ve dimensions of rectangle). Therefore
Dimensions of the rectangle are


I would say focus. I hope this helps.
Answer:
<h2>x = -7 or x = 1</h2>
Step-by-step explanation:
