Jika 16x^2 - 49y^2=333 dan 4x-7y=9 maka
Matematika
vinasantarosa27
Pertanyaan
Jika 16x^2 - 49y^2=333 dan 4x-7y=9 maka
1 Jawaban
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1. Jawaban arsetpopeye
16x^2 - 49y^2 = 333
(4x + 7y)(4x - 7y) = 333
(4x + 7y)(9) = 333
4x + 7y = 333/9
4x + 7y = 37
4x + 7y = 37
4x - 7y = 9
----------------- +
8x = 46
x = 46/8 = 23/4
4x + 7y = 37
4x - 7y = 9
------------------ --
14y = 28
y = 2