Question

6: Simplify the following expressions:
(s + √7) (2 + √5)
(5 + √5) (5-√5)​

Answer 1

Answer:

1)10 + 5√5+ 2✓7 + ✓35

2)20

Answer 2

Step-by-step explanation:

1) (s+√7)(2+√5)

(2×s+√5*s)(2*√7-√5*√7)

(2s+√5 s+2√7-√35)

2)using the identity (a+b)(a-b)=a^2+b^2

we can write this as

5^2 -(√5)^2

25 - 5

=20