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Subtraction of Algebraic Expression

Subtract the ...

Question

Subtract the second expression from the first by horizontal method :
$(4 x y - 9 z), (3 x y - 16 z)$

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Solution

(4xy - 9z) - (3xy - 16z)
= 4xy - 9z -3xy + 16z [-ve sign changes signs inside bracket]
= xy + 7z

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