Question

Tentukan hasil perkalian suku dua berikut ini, kemudian sederhanakan.
a. (x + 2)(x + 4)
b. (2p + 5)(2p – 5)
c. (4 + 2m)(m – 8)
d. (10x – 3)(2x – 1)
e. (7 – x)(7x – 1)

Answer 1

A. x^2 + 2x + 4x + 8 = x^2 + 6x + 8
b. 4p^2 + 10p -10p - 25 = 4p^2 - 25
c. 4m - 32 + 2m^2 - 16 = 4m + 2m^2 - 48
d. 20x^2 - 10x - 6x + 3 = 20x^2 - 16x + 3
e. 49x - 7 - 7x^2 + x = 50x - 7 - 7x^2

Answer 2

A. (x+2)(x+4)= x²+4x+2x+8= x²+6x+8
b. (2p+5)(2p-5)= 4p²-10p+10p-25= 4p²-25
c. (4+2m)(m-8)= 4m-32+2m²-16m= -12m-32+2m²
d. (10x – 3)(2x – 1)= 20x²-10x-6x+3= 20x²-16x+3
e. (7 – x)(7x – 1)= 49x-7-7x²-x= 48x-7-7x²