roman solved the equation for a. his steps are shown below.
which statement about roman’s work is true?

in step 1, he needed to add 2b to both sides of the equation.
in step 1, he needed to divide both sides of the equation by 2b.
in step 2, he needed to divide both sides of the equation by 5.
in step 2, he needed to subtract 5 from both sides of the equation.

step 1, he needed to add 2b to both sides

Step-by-step explanation:

he needed to do this to get rid of that 2b

0 is its x and y coordinate

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