substract:
i) 3x^2 - 2y^2 from -2x^2 -4y^2
ii) 3abc - ab + a^2 from 2abc - 2a^2 - 2ab
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Step-by-step explanation:
Given terms are 7a
2
bc , −3abc
2
, 3a
2
bc , 2abc
2
Required sum =7a
2
bc+(−3abc
2
)+(3a
2
bc)+(2abc
2
)
Rearranging and collecting like terms,
=7a
2
bc+3a
2
bc−3abc
2
+2abc
2
=(7+3)a
2
bc+(−3+2)abc
2
=10a
2
bc−abc
2
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