Question

X^2 - 4 Find the roots

Answer 1

Write the polynomial as an equation.
y=x^2-4

To find the roots of the equation, replace y with 0 and solve.
0=x^2-4

Replace y with 0 and solve for x
X^2-4=0

Add 4 to both sides of the equation
X^2=4

Take the square root of both sides of the equation to eliminate the exponent on the left side.
X= ±√4

The complete solution is the result of both the positive and negative portions of the solution.
X=2,-2