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= 12p² - 4
b) 4 + 6a² - 5ab + (-2ab) + a² - 3
= 7a² - 7ab + 1
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a) pengurangan 3p² + 8 dari 7p² - 3
= 7p² - 3 - (3p² + 8)
= 7p² - 3 - 3p² - 8
= 4p² - 11
b) pengurangan 7a² - 4ab - 2 dari -4ab + a² - 7
= -4ab + a² - 7 - (7a² - 4ab - 2)
= -4ab + a² - 7 - 7a² + 4ab + 2
= -6a² - 5
= 12p² - 4
b) 4 + 6a² - 5ab + -2ab + a² - 3 = 6a² + a² - 5ab - 2ab + 4 - 3
= 7a² - 7ab + 1
a) 7p² - 3 - (3p² + 8) = 7p² - 3 - 3p² - 8
= 7p² - 3p² - 3 - 8
= 4p² - 11
b) -4ab + a² - 7 - (7a² - 4ab - 2) = -4ab + a² - 7 - 7a² + 4ab + 2
= a² - 7a² - 4ab + 4ab - 7 + 2
= -6a² - 5