Jika a = 2 + akar 7 dan b = 2 - akar 7, nilai a pangkat 2 + b pangkat 2 - 4ab ?
maria360
A ^2 + b^ 2 -4ab = 4+4 akar 7 +7 + 4 -4 akar 7 +7 - 8 -4 akar 7 -8 +4 akar 7= 4+7+4+7-8-8= 6
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Hazifa13
oiya.. pilihannya
a. 28
b. 30
c. 32
d. 34
e. 36
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