Question

Tolong bantu ya kak dengan caranya

Answer 1

Verified answer

Kelas 9 Matematika
Bab Akar dan Pangkat

1/(1 + √2)² - 1/(1 - √2)²
= ((1 - √2)² - (1 + √2)²)/((1 + √2)² (1 - √2)²)
= (1 - 2√2 + √2² - (1 + 2√2 + √2²)) / ((1² - √2²)²)
= (1 - 2√2 + 2 - 1 - 2√2 - 2)/((1 - 2)²)
= (-4√2)/1
= -4√2

✩✩ D ✩✩