Question

What are the solution(s) x^2-4=0?

Answer 1

x^2 - 4 = 0

x^2 = 4

Square root x^2 and 4

x= 2 and/or x = -2

Answer 2

Answer: Hello there!

here we have the equation x^2 - 4 = 0 and we want to find the solutions.

The first thing we need to do is isolate the x therm:

x^2 - 4 = 0

x^2 = 4

Now we know that x squared must be equal to 4, now we can apply the square root in both sides of the equation.

√x^2 = ± √4

x = ±2

so here we have two solutions, x= 2 and x = -2

where the ± appears because the square root has two solutions, 2 and - 2, because 2*2 = 4 and (-2)*(-2) = 4