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Persamaan 2 Variabel2p-3q=4
7p+2q=39
---------------
4p-6q=8
21p+6q=117
--------------- (+)
25p =125
p=125/25
p=5
2p-3q=4
2(5)-3q=4
10-3q=4
-3q=4-10
-3q=-6
q=-6/-3
q=2
p=x=5
q=y=2
(5,2)
x²+y²=5²+2²=25+4=29
Pilihan B.
Demikian Semoga Membantu dan Bermanfaat!
↬Gunakan metode eliminasi :
2p - 3q = 4 | ×2 |
7p + 2q = 39 | ×3 |
——————————
4p - 6q = 8
21p + 6q = 117
———————— +
25p = 125
p = 125 / 25
p = 5
↬Kemudian, gunakan metode substitusi :
2p - 3q = 4
2.5 - 3q = 4
10 - 3q = 4
- 3q = 4 - 10
- 3q = -6
q = -6 / -3
q = 2
HP = { 5,2 }
x = p , y = q
maka, nilai x² + y² :
= p² + q²
= 5² + 2²
= 25 + 4
= 29 [ Opsi. B ]
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