Question

What are the solution(s) to the quadratic equation 40 - x2 = 0?

x = +2/10
x = +4/10
O x= +2/5
x = +4,5

Answer 1

±2√10

Explanation:

Given the equation 40 - x^2 = 0

Add x^2 to both sides

40 - x^2 + x^2 = 0+ x^2

40 = x^2

x^2 = 40

x = ±√40

x = ±√4 * √10

x = ±2√10

Hence the value of x is ±2√10