Q7 Subtract the following horizontally.
(a)5ab+7bc-2ca from 6ab+9bc-8ca
(b)2x2+3xy-4y? from 4x2-xy+3y?
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when we subtracting this type of question the lower sign is changed like + is converted in -
6ab+9bc-8ca - 5ab-7bc+2ca = ab+2bc -6ca
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