Question 5 - Addition and Subtraction of Algebraic Expressions - Chapter 10 Class 7 Algebraic Expressions

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Ex 12.2, 5 - What should be taken away from 3x^2 - 4y^2 + 5xy + 20 to

Ex 12.2, 5 - Chapter 12 Class 7 Algebraic Expressions - Part 2

Transcript

Question 5 What should be taken away from 3x2 – 4y2 + 5xy + 20 to obtain – x2 – y2 + 6xy + 20? Given that (3x2 – 4y2 + 5xy + 20) − Expression = (– x2 – y2 + 6xy + 20) (3x2 – 4y2 + 5xy + 20) − (– x2 – y2 + 6xy + 20) = Expression Expression = (3x2 – 4y2 + 5xy + 20) − (−x2 − y2 + 6xy + 20) Putting like terms below like terms & subtracting Answer is 4x2 − 3y2 − xy

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