Question

1.tentukan hasil perkalian bentuk aljabar berikut
A.2(x +4)
B.-3(a-2b)
C.5(3x+2y)
D.-2a(a +4b)
E.4a^2(-a +2b)
F.2xy(x -4)
g.-p^2(p^2-3p)
H.1per 2(4x-6y)
2.jabarkan bentuk perkalian berikut dengan menggunakan sifat distribusi
A.(2x-3)(x +5)
B.(3x-y)(x+y)
C.(5m-1)(m+4)
D.(2p+q)(p-4q)
E.(a -4)(2a+3)
F.(a+3b)(2a-4b)
G.(-3-p)(5+p)
H.(5+a)(7-a)
memakai cara

Answer 1

1.
A.2(x+4) =2x+8
B.-3(a-2b) =-3a+6b
C.5(3x+2y) =15x+10y
D.-2a(a+4b) =-2a^2-8b
E.4a^2(-a+2b) =-4a^3+8a^2b
f.2xy(x-4) =2x^2y-8xy
g.-p^2(p^2-3p)= -p^4+3p^3
h.lewat belum tau.
2.
A.(2x-3)(x+5)=2x(x+5)-3(x+5)
=2x^2+10x-3x-15
=2x^2+7x-15

B.(3x-y)(x+y)=3x(x+y)-y(x+y)
=3x^2+3xy-xy-y^2
=3x^2+2xy-y^2

C.(5m-1)(m+4)=5m(m+4)-1(m+4)
=5m^2+20m-m-4
=5m^2+19m-4
D.(2p+q)(p-4q)=2p(p-4q)+q(p-4q)
=2p^2-8pq-pq-4q^2
=-2p^2-9pq
E.(a-4)(2a+3) =a(2a+3)-4(2a+3)
=2a^2+3a-8a-12
=2a^2-5a-12
F.(a+3b)(2a-4b)=a(2a-4b)+3b(2a-4b)
=2a^2-4ab+6ab-12b^2
=2a^2+2ab-12b^2
G.(-3-p)(5+p) =-3(5+p)-p(5+p)
=-15-3p-5p-p^2
=p^2-8p-15
H.(5+a)(7-a) = 5(7-a)+a(7-a)
= 35-5a+7a-a^2
=a^2+2a+35