Question

2. Simplify the following using multiplication and division properties of surds:
(7√a-5√b)(7√a+5√b)​

Answer 1

Answer:

49a - 25 b

Step-by-step explanation:

Simplify the following using multiplication and division properties of surds:

(7√a-5√b)(7√a+5√b)​

(7√a - 5b)(7√a + 5√b)

= 7*7 * √a * a   + 7*5*√a*b  - 5*7*√b*a  - 5*5*√b*b

= 49*√a² + 35√ab - 35√ba - 25√b²

= 49a + 35√ab - 35√ab - 25b

= 49a - 25 b

(7√a - 5b)(7√a + 5√b) = 49a - 25 b