Answer:
x = -3, 6
Step-by-step explanation:
First, add 18 to both sides
x² - 3x - 18 = 0
+ 18 + 18
x² - 3x = 18
Add 9/4 to both sides because that is the square of half of -3
x² - 3x + 9/4 = 18 + 9/4
Multiply both sides by 4 to get rid of the fractions
(x² - 3x + 9/4 = 18 + 9/4)4
4x² - 12x + 9 = 72 + 9 = 81
Factor the left side of the equation
(2x - 3)² = 81
√(2x - 3)² = √81
Because of the square root, this will result in a positive number and a negative number
2x - 3 = 9
2x - 3 = -9
For both equations, add 3 to both sides then divide by 2
2x - 3 = 9
+ 3 +3
2x = 12
2x/2 = 12/2
x = 6
2x - 3 = -9
+ 3 + 3
2x = -6
x = -3
Answer:
A. <em>p=3-2h</em>
<em>h</em><em>=</em><em>9-p</em>
Step-by-step explanation:
Justin buys 3 less than twice as many <em>h</em>ot dogs
Canada's populations times 10 and you will get the answer.
Answer:
12-6u
Step-by-step explanation:
To remove the parenthesis, we must multiply the number on the outside to each value within the parenthesis
This means that
Answer:
20.25 inches
Step-by-step explanation:
2.25x9=20.25
