Question

25. Rationalize 1/(7√2-2√5)​

Answer 1

Answer:

$\dfrac{7√2 - 2√5}{70}$

Step-by-step explanation:

$\dfrac{1}{7√2 - 2√5}$

= $\dfrac{1 × (7√2 + 2√5)}{7√2 - 2√5)(7√2 + 2√5)}$

= $\dfrac{7√2 + 2√5}{90 - 20}$

= $\dfrac{7√2 - 2√5}{70}$