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RD Sharma Solutions Class 7 Mathematics Solutions for Algebraic Expressions Exercise 7.2 in Chapter 7 - Algebraic Expressions

Question 8 Algebraic Expressions Exercise 7.2
  1. Add 2x2 - 3x + 1 to the sum of 3x2 - 2x and 3x+ 7.
Answer:

Given 2x2

  • 3x + 1, 3x2 - 2x and 3x + 7 sum of 3x2 - 2x and 3x + 7

= (3x2 - 2x) + (3x +7)

=3x2 - 2x + 3x + 7

= (3x2 + x + 7)

Now, required expression = 2x2 - 3x + 1+ (3x2+ x + 7)

= 2x2 + 3x2 - 3x + x + 1 + 7

= 5x2- 2x + 8

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