![Ex 12.2, 5 - Chapter 12 Class 7 Algebraic Expressions - Part 2](https://d1avenlh0i1xmr.cloudfront.net/fe5d13e9-4598-4a0c-b401-d73d503a6a82/slide30.jpg)
Addition and Subtraction of Algebraic Expressions
Addition and Subtraction of Algebraic Expressions
Last updated at April 16, 2024 by Teachoo
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