Select the correct answer. A mistake was made in the steps shown to simplify the expression. Which step includes the mist 1 + 32 5 +|-10) = 2 Step 1: = 1+ 32 5 + 10 = 2 1 + 9 Step 2: = 5 + 10 = 2 Step 3: = 10 + 10 = 2 Step 4: = 2 + 10 = 2 Step 5: = 12 = 2 Step 6: = 6 A. Step 1 B. Step 3​

b

Step-by-step explanation:

step 3=it must be corrected by

20=2

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