Question

Tentukan hasil kali dari bentuk bentuk aljabar berikut
a.10x(2y-10)=
b.(x+5) × (5x-1)=
c.(7-2x) × (2x-7)=

tolong jawab dg caranya ya??

Answer 1

A) 20xy - 100x
b) 5x²-1x+25x-5 = 5x²+24x-5
b)14x-49-4x²+14x = -4x²+24x-49

Answer 2

A.10x x 2y + 10x x -10 = 20xy - 100x
b. (x+5) x (5x-1) = (x . 5x) + ( x . -1) + (5 .5x) + (5 .-1 )
= 5x² - x +25x -5 = 5x² + 24x -5
c.(7-2x) x (2x-7) = (7.2x) + (7.-7) + (-2x. 2x) + (-2x. -7) = 14x - 49 -4x² + 14x = 14x + 14x -49-4x² = 28x -49 -4x²