1. (2√3 – 5) (2√3 + 5)

Jawaban:

1. -13

2. 6 – 8√6

3. 12√2 – 30

4. 2

5. 10√3 + 40

maaf kalau ada yang kurang tepat

Penjelasan dengan langkah-langkah:

1. (2√3 – 5) (2√3 + 5)

= 4√9 + 10√3 – 10√3 – 25

= (4 x 3) – 25

= 12 – 25

= -13

2. 2√3 (√3 – 4√2)

= 2√9 – 8√6

= 6 – 8√6

3. (4√2 – 1) (2 – 4√2)

= 8√2 – 16√4 – 2 + 4√2

= 12√2 – 32 -2

= 12√2 – 30

4. (√7 – √5) (√7 + √5)

= 7 + √35 – √35 – 5

= 7 – 5

= 2

5. 5√2 (√6 + 2√8)

= 5√12 + 10√16

= 5√4×3 + 40

= 10√3 + 40