Question

Find a positive whole value of x that will make expression 2x^2 + 1 be equal to 3

Answer 1

x = 1

Explanation:

2x² + 1 = 3

2x² = 2

x² = 1

x = 1, -1

However, we only want the positive value so the answer is 1

Answer 2

Explanation:

2x^2+1=3

2x^2=2

x^2=1

square root both sides

x = +1, -1

since qtesting is asking for a positive value,

x=1