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प्रश्न
Subtract the following expressions:
ab – bc – ca from –ab + bc + ca
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उत्तर
We have, –ab + bc + ca – (ab – bc – ca)
= –ab + bc + ca – ab + bc + ca
On combining the like terms,
= –ab – ab + bc + bc + ca + ca
= –2ab + 2bc + 2ca
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