Misal:
Diketahui:
Ditanya:
ab
Penyelesaian:
Eliminasi pers 1 dan 2
a + b = 62
a - b = 8
-------------- +
2a = 70
a = 70/2
a = 35
.
substitusi a ke pers 2
35 - b = 8
b = 35 - 8
b = 27
.....
Maka,
= (35)(27)
= 945
Penjelasan dengan langkah-langkah:
2a = 62+8
a = 70/2 → a = 35
2b = 62 – 8
b = 54/2 → b = 27
a x b = 35 x 27
a x b = 35 x (30 - 3)
a x b = 35 x 30 – 35 x 3
a x b = 1.050 – 105
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Misal:
Diketahui:
Ditanya:
ab
Penyelesaian:
Eliminasi pers 1 dan 2
a + b = 62
a - b = 8
-------------- +
2a = 70
a = 70/2
a = 35
.
substitusi a ke pers 2
a - b = 8
35 - b = 8
b = 35 - 8
b = 27
.....
Maka,
ab
= (35)(27)
= 945
Penjelasan dengan langkah-langkah:
a + b = 62
a - b = 8
2a = 62+8
a = 70/2 → a = 35
2b = 62 – 8
b = 54/2 → b = 27
a x b = 35 x 27
a x b = 35 x (30 - 3)
a x b = 35 x 30 – 35 x 3
a x b = 1.050 – 105
a x b = 945