Margot is sewing a ribbon on a seam along the perimeter of a square pillow. The side length of the pillow is 2x^2+1 inches. She plans to make a similar pillow, including the ribbon, whose side length is 4x-7 inches. What
expression can be used for the length of ribbon that she needs for both pillows, and what is the length if x = 3.5?
A) 2x^2+4x-6; 22.0 inches
B) 2x^2+4x-6; 32.5 inches
C) 4(2x^2+4x-6;) 88.0 inches
D) 4(2x^2+4x-6;) 130.0 inches

theres no picture: /

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

table a is wierd

step-by-step explanation:

6*f