Question

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

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


Help please it’s timed :)

Answer 1

x = ±2
`√(10)`.

Explanation:

40 - x^2 = 0

Subtract 40 from both sides

-x^2 = -40

Divide both sides by -1

x^2 = 40

Find the square root of both sides

x = ±
`√(40)`

x = ±
`√(2 * 2 * 2 * 5)`

x = ±
`√(2^2 * 2 * 5)`

x = ±2
`√(2 * 5)`

x = ±2
`√(10)`

Hope this helps!

Answer 2

The answer is 2 root 10.

hope it helps..