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Simplify this expression and find its value if x = 3, a = -1, b = -2. 2 - 8x + 4x + 4 - Mathematics

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Question

Simplify this expression and find its value if x = 3, a = -1, b = -2.

2 - 8x + 4x + 4

Sum

Solution

2 - 8x + 4x + 4 on putting x = 3 in the given equation

= 2 + 4 - 8x + 4x

= 6 - 4x 

= 6 - (4 × 3)

= 6 - 12

= -6

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Chapter 12: Algebraic Expressions - Exercise 12.3 [Page 242]

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NCERT Mathematics [English] Class 7
Chapter 12 Algebraic Expressions
Exercise 12.3 | Q 7.2 | Page 242

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