How Much Less 2a2 + 1 is than 3a2 – 6 ?

How much less 2a² + 1 is than 3a² – 6 ?

Sum

3a² – 6
+ 2a² + 1
– –
a² – 7

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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 8.2 | Page 140

Evaluate :

−7x² + 18x² + 3x²− 5x²

Evaluate :

b²y − 9b²y + 2b²y − 5b²y

Evaluate :

7x − 9y + 3 − 3x − 5y + 8

Evaluate :

3x² + 5xy − 4y² + x² − 8xy − 5y²

Add : 5a + 3b, a − 2b, 3a + 5b

Add : 3b − 7c + 10, 5c − 2b − 15, 15 + 12c + b

Subtract : 4xy² from 3xy²

Subtract : cab − 4cad − cbd from 3abc + 5bcd − cda

The perimeter of a triangle is 8y² – 9y + 4 and its two sides are 3y² – 5y and 4y² + 12. Find its third side.

How much smaller is 15x – 18y + 19z than 22x – 20y – 13z + 26 ?