Question

How do i do 2 x squared + 7=4

Answer 1

x = ±i sqrt(3/2)

Explanation:

2x^2+7 = 4

Subtract 7 from each side

2x^2+7-7 = 4-7

2x^2 = -3

Divide by 2 on each side

2x^2/2 = -3/2

x^2 = -3/2

There is no real solution, only imaginary solutions

Taking the square root of each side

sqrt(x^2) = sqrt(-3/2)

x = ±i sqrt(3/2)