## RD Sharma Class 8 Solutions Chapter 6 Algebraic Expressions and Identities Ex 6.2

These Solutions are part of RD Sharma Class 8 Solutions. Here we have given RD Sharma Class 8 Solutions Chapter 6 Algebraic Expressions and Identities Ex 6.2

**Other Exercises**

- RD Sharma Class 8 Solutions Chapter 6 Algebraic Expressions and Identities Ex 6.1
- RD Sharma Class 8 Solutions Chapter 6 Algebraic Expressions and Identities Ex 6.2
- RD Sharma Class 8 Solutions Chapter 6 Algebraic Expressions and Identities Ex 6.3
- RD Sharma Class 8 Solutions Chapter 6 Algebraic Expressions and Identities Ex 6.4
- RD Sharma Class 8 Solutions Chapter 6 Algebraic Expressions and Identities Ex 6.5
- RD Sharma Class 8 Solutions Chapter 6 Algebraic Expressions and Identities Ex 6.6
- RD Sharma Class 8 Solutions Chapter 6 Algebraic Expressions and Identities Ex 6.7

**Question 1.**

**Add the following algebraic expressions**

**Solution:**

**Question 2.**

**Subtract:**

**(i) -5xy from 12xy**

**(ii) 2a ^{2} from -7a^{2}**

**Solution:**

**Question 3.**

**Take away :**

**Solution:**

**Question 4.
**

**Subtract 3x – 4y – 7z from the sum of x – 3y + 2z and – 4X + 9y- 11z.**

**Solution:**

Sum of x – 3y + 2z and – 4x + 9y – 11z

= x – 3y + 2z + (- 4x + 9y – 11z)

= x – 3y + 2z – 4x + 9y – 11z

= x – 4x – 3y + 9y + 2z – 11z

= – 3x + 6y – 9z

Now (-3x + 6y – 9z) – (3x – 4y – 7z)

= -3x + 6y – 9z – 3x + 4y + 7z

= -3x – 3x + 6y + 4y -9z +7z

= -6x + 10y – 2z

**Question 5.
**

**Subtract the sum of 3l- 4m – 7n**

^{2}and 2l + 3m – 4n^{2}from the sum of 9l + 2m – 3n^{2 }and -3l + m + 4n^{2}.**Solution:**

Sum of 9l + 2m – 3n

^{2}and -3l + m + 4n

^{2 }= 9l + 2m – 3 n

^{2}+ (-3l) + m + 4n

^{2 }= 9l + 2m – 3n

^{2}– 3l + m + 4n

^{2 }= 9l- 3l+ 2m + m – 3 n

^{2}+ 4n

^{2 }= 6l + 3m + n

^{2 }and sum of 3l – 4m – 7n

^{2}and 2l +3m- 4n

^{2 }= 3l- 4m – 7n

^{2}+ 2l+ 3m- 4n

^{2 }= 3l + 2l – 4m + 3m- 7n

^{2}– 4n

^{2 }= 5l -m- 11n

^{2 }Now (6l + 3m + n

^{2}) – (5l – m – 11n

^{2})

= 6l + 3m + n

^{2}– 5l + m + 11n

^{2 }= 6l – 5l + 3m + m + n

^{2}+ 11n

^{2 }= l + 4m+ 12n

^{2}

**Question 6.
**

**Subtract the sum of 2x – x**

^{2}+ 5 and -4x – 3 + 7x^{2}from 5.**Solution:**

5 – (2x-x

^{2}+ 5-4x-3 + 7x

^{2})

= 5 – (2x – 4x- x

^{2}+ 7x

^{2}+ 5-3)

= 5 – (-2x + 6x

^{2}+ 2)

= 5 + 2x – 6x

^{2}– 2

= – 6x

^{2}+2x+3

= 3 + 2x – 6x

^{2}

**Question 7.**

**Solution:**

Hope given RD Sharma Class 8 Solutions Chapter 6 Algebraic Expressions and Identities Ex 6.2 are helpful to complete your math homework.

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