Question

Three places decimals, it given root 2 = 1.4142, root 3 = 1.732,root 5 = 2.2360. 3-root 5 upon 3+2 root 5.

Answer 1

We write what is required :

(3 - √5) / (3 + 2√5)

(3 - 2.2360) / (3 + 2 × 2.2360)

0.764/7.472 = 0.10225

The answer should be into three decimal places we have :

0.102