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=5p² + 7q + 4q + 3p +9
=5p² +( 7q + 4q )+ 3p +9
=5p² +( 7 + 4 )q+ 3p +9
=5p² +11q+ 3p +9
b. 3a² - 5a + 7a² + 9a - 2
=3a² + 7a² + 9a - 5a - 2
=(3a² + 7a² )+( 9a - 5a) - 2
=(3 + 7 )a²+( 9 - 5)a - 2
=10a²`+ 4a - 2
c. 6a³ - 4a² + 7a - 2a³ + 6a - 7
= 6a³ - 2a³ - 4a² + 7a + 6a - 7
= (6a³ - 2a³) - 4a² + (7a + 6a) - 7
= (6- 2)a³ - 4a² + (7+ 6)a - 7
= 4a³ - 4a² +13a - 7
d. 4x + 2y + 5x² + 3 - 2x + 3x² + 4y - 7
= 5x² + 3x² + 4x - 2x + 2y + 4y + 3 - 7
=(5x² + 3x² )+ (4x - 2x ) + (2y + 4y) + (3 - 7)
=(5 + 3 )x²+ (4 - 2) x + (2 + 4) y+ (3 - 7)
=8x² + 2x + 6y - 4
e. 3a + 4ab - 4a + 4a² + 3ab + 7a²b
= 7a²b + 4a² + 4ab + 3ab + 3a - 4a
= 7a²b + 4a² + (4ab + 3ab )+ (3a - 4a)
= 7a²b + 4a² + (4+ 3 )ab + (3 - 4) a
= 7a²b + 4a² + 7ab - a
semoga bisa membantu
p(5p +3) + 3 (4q+9)
b. 10 a^2 + 4a -2 = 0
5a^2 + 2a - 1 = 0
(5a +1) (a-1)
c. 4a^3 - 4a^2 + 13 a - 7 = 0
a(4 a^2 - 4a + 13) - 7 = 0
a (4a +13) (a +1) -7 =0
yang c bingung
d. 8x^2 + 2x + 6y - 4 = 0
8x^2 + 2x - 4 + 6y = 0
4x^2 + x -2 + 3y = 0
x(4x+1) -2 + 3y = 0
e. 4a^2 + 7a^2b + 7ab - a = 0
a (4a + 7ab + 7b -1) = 0