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Inessa05 [86]
3 years ago
5

Josephine has a rectangular garden with an area of 2x2 + x – 6 square feet

Mathematics
2 answers:
sdas [7]3 years ago
7 0
Factor
2x^2+x-6
trial and error, the factors are the legnth and width
or, we could try multiplying the given options
if we do we find the factored form is
(x+2)(2x-3)
answer is last one
AleksandrR [38]3 years ago
4 0

we have

2x^{2} +x-6

we know that

The area of a rectangle is equal to

A=L*W

where

L is the length side of the rectangle

W is the width side of the rectangle

In this problem

Equate the area to zero and Find the roots of the quadratic equation

2x^{2} +x-6=0

Group terms that contain the same variable, and move the constant to the opposite side of the equation

2x^{2} +x=6

Factor the leading coefficient

2(x^{2} +0.5x)=6

Complete the square. Remember to balance the equation by adding the same constants to each side

2(x^{2} +0.5x+0.25^{2})=6+0.125

2(x^{2} +0.5x+0.0625=6.125

Rewrite as perfect squares

2(x+0.25)^{2}=6.125

(x+0.25)^{2}=3.0625

Square root both sides

(x+0.25)=(+/-)\sqrt{3.0625}

(x+0.25)=(+/-)1.75

x1=-0.25+1.75=1.50

x2=-0.25-1.75=-2

so

2x^{2} +x-6=2(x+2)(x-1.50)

2(x+2)(x-1.50)=(x+2)(2x-3)

length=(2x-3)\ feet

width=(x+2)\ feet

therefore

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

length=(2x-3)\ feet ; width=(x+2)\ feet

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