Question

Jika A=-3 B=1 c=-5,hitunglah 2ab + 3bc - 4ac

Answer 1

2ab+3bc-4ac
=2(-3)(1)+3(1)(-5)-4(-3)(-5)
=-6-15-60
=-81

Answer 2

(2 x (-3 x 1)) + (3 x (1 x -5)) - (4 x (-3 x -5)) = (2 x -4) + (3 x -5) - (4 x -15)

                                                                    =     -8   +   (-15)   -   (-60)

                                                                    =      -8  - 15 +  60

                                                                   =          - 23    +    60

                                                                   =              37