Question

Diketahui A.10x -3 ,B=5-3x, dan C.=2x+1 tentukan
A.AxB
B.(A+B)xC
C.A+BxC
D.AxBxC

Answer 1

Bab Aljabar Dasar
Matematika SMP Kelas VII

1] A . B = (10x - 3) (5 - 3x)
A . B = 50x - 30x² - 15 + 9x
A . B = -30x² + 59x - 15

2] (A + B) . C = (10x - 3 + 5 - 3x) . (2x + 1)
(A + B) . C = (7x + 2) (2x + 1)
(A + B) . C = 14x² + 11x + 2

3] A + (B . C) = 10 - 3x + (5 - 3x) (2x + 1)
A + (B . C) = 10 - 3x + 10x + 5 - 6x² - 3x
A + (B . C) = -6x² + 4x + 15

4] A . B . C = (10x - 3) (5 - 3x) (2x + 1)
A . B . C = (-30x² + 59x - 15) (2x + 1)
A . B . C = -60x³ - 30x² + 118x² + 59x - 30x - 15
A . B . C = -60x³ + 88x² + 29x - 15