" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
Dari soal di atas didapat 4 persamaan6a + 2b = 12
3a + b = 6 (i)
-5a + 4b = -27 (ii)
3.6 + (-2).2 = 14
3(-5) + -2(4) = -23
Eliminasi persamaan (i) dan (ii)
3a + b = 6
12a + 4b = 24 (i)
-5a + 4b = -27 (ii)
_____________ -
17a = 51
a = 3
Substitusi nilai a ke persamaan (i)
3a + b = 6
3(3) + b = 6
9 + b = 6
b = -3
(a + b)(a - b)
= (3 + (-3)) (3 - (-3))
= (3 - 3) (3 + 3)
= 0 . 6
= 0