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alexandr402 [8]
3 years ago
6

A square piece of paper has an area of x2 square units. A rectangular strip with a width of 2 units and a length of x units is c

ut off of the square piece of paper. The remaining piece of paper has an area of 120 square units.
Which equation can be used to solve for x, the side length of the original square?


x2 − 2x − 120 = 0

x2 + 2x − 120 = 0

x2 − 2x + 120 = 0

x2 + 2x + 120 = 0
Mathematics
2 answers:
vlabodo [156]3 years ago
6 0

Let

x--------> the length side of the original square paper

we know that

<u>the area of the original square paper is equal to</u>

A1=x*x=x^{2} \ units^{2}

<u>the area of the remaining piece of paper is equal to</u>

A2=x^{2} -2x\\ A2=120\ units^{2} \\ so\\ x^{2} -2x=120\\ x^{2} -2x-120=0

therefore

<u>the answer is the option </u>

x2 − 2x − 120 = 0

jekas [21]3 years ago
5 0
The answer is x² - 2x - 120 = 0
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