Question

(1)subtract the sum of 12ab-10b^2-18a^2-9ab+12b^2+14a^2 frome the sum of ab+2b^2- a^2_________ (2) subtract the sum of 3x^2+2xy-2y^2 and 5y^2-7xy from 5x^2-3xy _________ if two adjacent sides of a rectangular are 4x+7y and 3y-x find it's perimeter. __________​

Answer 1

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