Question

Expand and Simplify (2 + √5 )(1 – √5 )

Answer 1

Step-by-step explanation:

(2 + √5 )(1 – √5 )

2(1-√5)+√5(1-√5)

2-2√5+√5-(√5)^2

2-√5-5= -3-√5

Answer 2

Answer:

7 + 3√5

Step-by-step explanation:

(2 + √5 )(1 +√5 ) = 2 * 1 + 2 * √5 + √5 * 1 + √5 * √5 = 2 + 2√5 + √5 + 5 = 7 + 3√5

So, the simplified form of the expression is: 7 + 3√5