Question

Help me kakak no 18 ya kak

Answer 1

Verified answer

✔ Mapel = Matematika
✔ Kelas. = SMA
✔ Materi = Akar dan Pangkat
✔ Kata kunci = Akar

Penyelesaian :
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x = 1/(1 + √2)
x = 1/(1 + √2) x (1 - √2)/(1 - √2)
x = (1 - √2)/(1 - 2)
x = (1 - √2)/(-1)
x = -1 + √2

y = 1/(1 - √2)
y = 1/(1 - √2) x (1 + √2)/(1 + √2)
y = (1 + √2)/(1 - 2)
y = (1 + √2)/(-1)
y = -1 - √2

x + y
= (-1 + √2) + (-1 - √2)
= -1 + √2 - 1 - √2
= -1 - 1 + √2 - √2
= -2

Jawabannya B

Semoga Membantu :)

Answer 2

Verified answer

Jawaban terlampirrrrrrrrr