Question

I really need help on this one

Answer 1

Answer:

Step-by-step explanation:

1.Find X

x^2 +8x+15 = (x+5)

       -x             -x

x^2+7x+15=5

            -5  -5

x^2 +7x+10=0

Do the quadralic formula

a=1 b=7 c=10

-7±√7^2-4(1)(10)

          2(1)

-7±√49-40

        2

-7±√9

    2

-7±3

divide 2 by each number

-3.5 ± 1.5

-3.5+1.5           -3.5-1.5

     -2                    -5

x= -2 x=-5

2. find the length of the garden

-2+5 =3

the length is 3

3. plug in the length to the area of the garden

-5^2+8(-5)+15=3

solve

25-40+15=3

0=3

the width of the garden is 3 square feet