Jawaban:
Jadiin jawaban tercerdas yaaa. makasihhh
MatrIksKesamaan
13. i) 5a-b = 10 ii) 2a +3 = -4 2a = -7a= - 7/2
5a- b = 10b = 5a - 10b = 5(-7/2) - 10b = -35/2 - 10b= -55/2
a- b = - 7/2 - (-55/2)a - b = - 7/2 + 55/2a- b = 48/2a - b = 24
14,
i) -4 = 2aa= - 2ii) ab = 10-2b = 10b = -5
nilai a²+b² = (-2)²+(-5)²= 4 +25= 29
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Jawaban:
Jadiin jawaban tercerdas yaaa. makasihhh
MatrIks
Kesamaan
13.
![\left[\begin{array}{ccc}7&5a-b\\2a+3&14\end{array}\right] =\left[\begin{array}{ccc}7&10\\-4&14\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D7%265a-b%5C%5C2a%2B3%2614%5Cend%7Barray%7D%5Cright%5D%20%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D7%2610%5C%5C-4%2614%5Cend%7Barray%7D%5Cright%5D "\left[\begin{array}{ccc}7&5a-b\\2a+3&14\end{array}\right] =\left[\begin{array}{ccc}7&10\\-4&14\end{array}\right]")
i) 5a-b = 10
ii) 2a +3 = -4
2a = -7
a= - 7/2
5a- b = 10
b = 5a - 10
b = 5(-7/2) - 10
b = -35/2 - 10
b= -55/2
a- b = - 7/2 - (-55/2)
a - b = - 7/2 + 55/2
a- b = 48/2
a - b = 24
14,
i) -4 = 2a
a= - 2
ii) ab = 10
-2b = 10
b = -5
nilai a²+b² = (-2)²+(-5)²
= 4 +25
= 29