dijawab ya dgn benar

•1

a ) 5a + 7a - 3a = 9a

b ) 4x + 10y - 9x + 12xy
= 4x - 9x + 10y + 12xy
= -5x + 10y + 12xy

c ) 12a² - 8b + 16a²
= 12a² + 16a² - 8b
= 28a² - 8b
= 4 (7a²-2b)

d ) 6x³ + 2y² + y² - 5x³
= 6x³ - 5x³ + 2y² + y²
= x³ + 3y

•2

a ) 7a - 10a = -3a

b ) -4x + 12x = 8x

c ) -15p + 9p - 18p
= -24p

d ) 9x + 6y - 10y - 8x
= 9x - 8x + 6y - 10y
= x - 4y

e ) 6q² - 8q + q² - 2q
= 6q² + q² - 8q - 2q
= 7q² - 10 q
= q (7q-10)

f ) x² + 8y² - 16 + 10x² - 7y² + 11
= x² + 10x² + 8y² - 7y² - 16 + 11
= 11x² + y² + 5

•3

a ) 18a - 5 (a-3b)
= 18a - 5a + 15b
= 23a + 15b

b ) 12 + 2(4x-3)
= 12 + 8x - 6
= 12 - 6 + 8x
= 6 + 8x
= 2 (3+4x)

c ) 8 (3x+4y) - 5 (4x-6y)
= 24x + 32y - 20x + 30y
= 24x - 20x + 32y + 30y
= 4x + 62y
= 4 (x+13y)

d ) a (a+3b) + 2a (4a+5b)
= a² + 3ab + 8a² + 10ab
= a² + 8a² + 3ab + 10ab
= 9a² + 13ab
= a (9a+13b)

e ) 5x (4x-3y) - 3x (5x+2y)
= 20x² - 15 xy - 15x² - 6xy
= 20x² - 15x² - 15xy - 6xy
= 5x² - 21xy
= x (5x+21y)

•4

c ) (8x²+4x-21) + (6x²-14x+7)
= 8x² + 6x² + 4x - 14x - 21 + 7
= 14x² - 10x - 14

Maaf cuma bisa jawab segini, efek mager, maapkeun (ToT)