Question

unit3 quiz 1
question 21 (mandatory) (1 point)
if (x^{2}+1 = 5), then (x) is equal to
a) 4
b) 3
c) 5
d) 2

Explanation:

Step1: Solve the equation

Given \(x^{2}+1 = 10\), we first isolate \(x^{2}\) by subtracting 1 from both sides of the equation. So \(x^{2}=10 - 1=9\).

Step2: Find the value of \(x\)

Taking the square - root of both sides, we get \(x=\pm\sqrt{9}=\pm3\). Among the given options, the correct value is 3.

Answer:

B. 3