Since we always want to have an a which equals 1 so then we don't have to do AC method, a longer process, we're going to want to take out the -1.
-1(x^2 - x - 42)
Then, we want to know what two number multiply to equal c (-42 here) and add up to equal b (-1 here). Those two numbers would be -7 and 6 since -7(6) = -42 and -7 + 6= -1.
So then from here we can just plop these numbers into (x+ __).
1(x-7)(x+6)
This is your final answer, A.
The width of the walkway around the pool will be 2 feet.
<h3>What is the area of the rectangle?</h3>
Let L be the length and W be the width of the rectangle.
Then the area of the rectangle will be
Area of the rectangle = L × W square units
Nicole is building a walkway with a width of x feet to go around a swimming pool that measures 11 feet by 7 feet.
Let a be the width of the walkway.
The area of the pool will be
If the total area of the pool and the walkway will be 165 square feet.
Area of pool = (11 + 2a) x (7 + 2a)
165 = 4a² + 36a + 77
4a² + 36a - 88 = 0
a² + 9a - 22 = 0
a² + 11a - 2a - 22 = 0
(a + 11)(a - 2) = 0
a = -11, 2
The width of the walkway around the pool will be 2 feet.
More about the area of the rectangle link is given below.
brainly.com/question/20693059
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Answer:
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Step-by-step explanatio:espero que te ayude
Answer: thx
Step-by-step explanation:
