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Algebraic Expressions — Maths STD 6 — Question

Maharashtra BoardEnglish MediumSTD 6MathsAlgebraic Expressions3 Marks
Question
Simplify:
-a - [a + {a + b - 2a - (a - 2b)} - b]
✓

Answer

Removing the innermost grouping symbol () first, then { } and ten [ ], we have:
-a - [a + {a + b - 2a - (a - 2b)} - b]
= -a - [a + {a + b - 2a - a + 2b} - b]
= -a - [a + {- 2a + 3b} - b]
= - a - [a - 2a + 3b - b]
= -a - a + 2a - 3b + b
= -2a + 2a - 2b
= -2b

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