Question

Tentukan hasil perkalian suku dua berikut,kemudian sederhanakan!
a.(x+5) (x+3)
b.(x-4) (x+1)
c.(2x+4) (3x+1)
d.(-3x+2) (x-5)

Answer 1

A. (x+5) (x+3)= x^2+3x+5x+15= x^2+8x+15
b. (x-4) (x+1)= x^2+x-4x-4= x^2+3x-4
c. (2x+4) (3x+1)= 6x^2+2x+12x+4= 6x^2+14x+4
d. (-3x+2) (x-5)= -3x^2-15x+2x-10= 3x^2-13x-10

kalau salah jangan salahin saya

Answer 2

A.(x+5)(x+3)=x.x+x.3+5.x+5.3
=x^2+3x+5x+15
=x^2+8x+15
b.(x-4)(x+1)=x.x+x.1-4.x-4.1
=x^2+x-4x-4
=x^2-3x-4
c.(2x+4)(3x+1)=2x.3x+2x.1+4.3x+4.1
=6x^2+2x+12x+4
=6x^2+14x+4
d.(-3x+2)(x-5)=-3x.x-3x.-5+2.x+2.-5
=-3x^2+15x+2x-10
=-3x^2+17x-10