Penyelesaian dari persamaan 2^{x^{2}-3x-4}= 4^{x+1} adalah p dan q, dengan p>q , nilai p-q = …
Jawaban Terkonfirmasi
2^(x^2 – 3× – 4) = 4^( × + 1 )
2^(×^2 – 3× – 4) = 2^ 2( × + 1)
×^2 – 3× – 4 = 2× + 2
×^2 – 5× = 6
×^2 – 5× – 6 =0
(x – 6)(× + 1) =0
p = 6
q = -1
p – q
= 7
Jawaban Terkonfirmasi
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x² – 3x – 4 = 2x + 2
x² – 3x – 2x - 4 – 2 = 0
x² – 5x – 6 = 0
(x + 1) (x – 6) = 0
x + 1 = 0 atau x – 6 = 0
x = – 1 atau x = 6
sehingga p = 6 dan q = – 1
p – q = 6 – (- 1)
= 6 + 1
= 7