Question

Rearrange to make x the subject

Answer 1

Explanation:

(10 - x^2)/b = b/2

Cross multiply

2(10 - x^2) = b^2

20 - 2x^2 = b^2

2x^2 = 20 - b^2

Dividing through by 2

x^2 = (20 - b^2)/2

√x^2 = √(20 - b^2)/2

x = √(20 - b^2)/2