Add:
a) 7xyz , 5xyz , -4xyz b) 19m , -55m , 5m
c) 5xy+2x , -2xy+3y , 8xy-3x+4y
d) 2a+3b-4c , 8c-1 , 5b+4
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Answer:
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Step-by-step explanation:
7xyz + 5xyz + (-4xyz) = 8xyz
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19m + (-55m) + 5m = -31m
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5xy+2x + (-2xy)+3y + 8xy(-3x)+4y
⇒5xy-2xy+8xy+2x-3x+3y+4y
⇒11xy-x+7y
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2a+3b-4c + 8c-1 + 5b+4
⇒2a+3b+5b-4c+8c-1+4
⇒2a+8b+4c+3
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When an electric current is passed through a conductor, the conductor becomes hot after some time and produce heat. This happens due to the conversion of some electric energy passing through the conductor into heat energy. This effect of electric current is called heating effect of current.
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