What are the solution(s) to the quadratic equation 40 − x2 = 0? x = ±2 x = ±4 x = ±2 x = ±4
2 answers:
Answer: 
Step-by-step explanation:
To find the solutions of the quadratic equation given in the problem, you can apply the proccedure shown below:
- Subtract 40 from both sides of the equation.
- Multiply both sides of the equation by -1
- Apply square root to both sides of the equation.
Therefore, by applyin the steps above, you obtain:

Answer:
= ±2√10
Step-by-step explanation:
40 − x2 = 0
We could solve this by;
subtracting x² from both sides
we get;
40 = x²
Then we get the square root on both sides;
√x² = √40 ; but the square root of a positive number "a" is +√a or -√a
Therefore;
√x² = ± √40
x = ±√40
√40 = √4√10
= 2√10
Thus;
x = ±2√10
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