Sederhanakanlah bentuk aljabar berikut !
a. 9a + 19ab + 17a
b. 7a³ - 8a² - 16³ + 11a² + 9
c. 8 ( 3x + 4 ) - 5 ( 4x - 6 )
d. 5 ( 4x - 3y ) + 3 ( 5x + 2y )
a. 9a + 19ab + 17a
b. 7a³ - 8a² - 16³ + 11a² + 9
c. 8 ( 3x + 4 ) - 5 ( 4x - 6 )
d. 5 ( 4x - 3y ) + 3 ( 5x + 2y )
1) 9a + 19ab + 17a = 45a
2) 7a³ - 8a² - 16³ + 11a² + 9
= 7a³ - 16a³ - 8a² + 11a² + 9
= - 9a³ + 3a² + 9
3) 8( 3x + 4 ) - 5( 4x - 6 )
= (24x + 32) - (20x + 30)
= 24x + 32 - 20x - 30
= 24x - 20x + 32 - 30
= 4x + 2
4) 5( 4x - 3y ) + 3( 5x + 2y )
= (20x - 15y) + (15x + 6y)
= 20x - 15y + 15x + 6y
= 20x + 15x - 15y + 6y
= 35x - 9y
=26a+19ab
b. 7a³-8a²-16³+11a²+9=7a³-8a²+11a²-16³+9
=7a³-3a²-16³+9