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a.) 12 + 2(4p-3)
12 + 8p - 6
=6 + 8p
b.) 8(3x + 4y) - 5(4x - 6y)
=24x + 32y - 20x + 30y
=4x + 62y
c.) 5x(4x - 3y) + 3x(5x + 2y)
=20x² - 15xy + 15x² + 6xy
=35x² - 9xy
5.
a.) 5a + 8 dan 8a + 3
= 5a+ 8 + 8a + 3
= 13a + 11
b.) 5a - 5b - 2c dan -8a + 6b + 9c
=(5a - 5b - 2c) + (-8a + 6b + 9c)
= -3a + b + 7c
c.) 5p(4p-3) dan 7p(3p+4)
= 20p² -15p + 21p² + 28p
= 41p² + 13p
d.) 4x(2x² - 3x + 5) dan 3x(4x + 9x - 8)
= 8x³ - 12x² + 20x + 12x² + 27x² - 24x
= 8x³ +27x²2 -4x
Yg d bagian 4x saya tebalkan, rancu 4x atau 4x²
Kalau soalnya 4x²,
= 8x³ - 12x² + 20x + 12x³ + 27x² - 24x
= 20x³ - 4x
Semoga membantu