Take M2 + M + 4 from −M2 + 3m + 6 and the Result from M2 + M + 1.

Take m² + m + 4 from −m² + 3m + 6 and the result from m² + m + 1.

Sum

− m² + 3m + 6
+ m² + m + 4
− − −
− 2m²+ 2m + 2
A.T.Q. m² + m + 1
− 2m² + 2m + 2
+ − −
3m² − m − 1

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Combining like Terms

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Chapter 11: Algebraic Expressions - Exercise 11 (B) [Page 140]

Chapter 11 Algebraic Expressions
Exercise 11 (B) | Q 5.2 | Page 140

Evaluate :

−7x² + 18x² + 3x²− 5x²

Add : 8x − 3y + 7z, −4x + 5y − 4z, −x − y − 2z

Find the total savings of a boy who saves ₹ (4x – 6y), ₹ (6x + 2y), ₹ (4y – x) and ₹ (y – 2x) for four consecutive weeks.

Subtract : 4xy² from 3xy²

Subtract : 6a + 3 from a³ − 3a² + 4a + 1

Subtract : a²+ ab + b² from 4a² − 3ab + 2b²

Subtract the sum of 5y² + y – 3 and y² – 3y + 7 from 6y² + y – 2.

How much more than 2x² + 4xy + 2y² is 5x² + 10xy – y² ?

The two adjacent sides of a rectangle are 2x² – 5xy + 3z² and 4xy – x² – z². Find its perimeter.

What must be subtracted from 19x⁴ + 2x³ + 30x – 37 to get 8x⁴ + 22x³ – 7x – 60 ?