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= (-15+9-18)p
= -24p
E. 6q² - 8q + q²- 2q
= 6q² + q² - 8q - 2q
= 7q² - 10q
3. C . 8(3x + 4y ) - 5(4x - 6y )
= 24x + 32y - 20x + 30y
= 24x -20x + 32y + 30y
= 4x - 62y
3. D. a(a + 3b ) + 2a ( 4a + 5b )
= a2 + 3ab + 8a² + 20ab
= a² + 8a² + 3ab + 20ab
= 9a² + 23ab
4. A . 5a +8 dan 8a +3
= 5a + 8a + 8 + 3
=13a + 11
D. 2(3a + 5b + 3 ) + 4(2b - 3a + 6 )
= 6a + 10b + 6 + 8b - 12a + 24
=6a - 12a + 10b + 8b + 6 + 24
= - 6a + 18b + 30
E. 2(2x² - 3x + 5 ) + 3(4x² + 2x - 7 )
= 16x² + 4
5. A. (7a + 14) + ( 9a + 12 )
= 7a-9a + 14 + 12
= - 2a + 26
B .12p - 7q + 6 - 15p + 18q - 17
= 12p - 15p - 7q + 18q + 6 - 17
= 3p - 11q + 11
E. -5( 4y² - 2y + 8 ) - 4(7y² + 6y - 5 )
= - 20y² - (- 10y) + - 40 - 28y² + 24y- 20
= - 20y² - 28y² + 10y + 24y - 40 - 20
= - 48y² + 34y - 60