tentukan penyelesaian sistem persamaannya! tolong dibantu !
Matematika
Aiida11
Pertanyaan
tentukan penyelesaian sistem persamaannya!
tolong dibantu !
tolong dibantu !
1 Jawaban
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1. Jawaban MuhammmadRizky
Chapter System of Linear Equations
Class 8 SMP
Mathematics
"Two Variable Linear Equation Systems"
Mixed Methods (Substitution - Elimination)
Settlement
-1 = 2x - y
-1 - 2x = -y (x -1)
1 + 2x = y
y = 2x² + 3x - 2
2x² + 3x - 2 = 1 + 2x
2x² + 3x - 2x -2 - 1 = 0
2x² + x - 3 = 0
(2x + 3) (x - 1) = 0
2x = -3 x - 1 = 0
x = -3/2 x = 1
If x = -3/2 if x = 1
y = 1 + 2x y = 1 + 2x
= 1 + 2 (-3/2) = 1 + 2 (1)
= 1 + -3 = 1 + 2
y = -2 y = 3
Settlement set = {-3/2 , -2 atau 1, 3}
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