Select the function that represents the simple interest formula. A. A(n) = P+ (n - 1)i. P, where nis a positive integer
O B. A(n) = n + (i – 1). P, where n is a positive integer
O C. A(n) = (n − 1)(P•n)', where n is any real number
O D. A(n) = P(1 + )" – 1, where nis a positive integer

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

answer: 5100 just subtract

step-by-step explanation: