Algebraeasy · Past Paper
Simplify 5x^2 - [2x^2 - (x^2 - 1)].
A4x^2 - 1
B4x^2 + 1
C2x^2 + 1
D6x^2 - 1
✓ Correct Answer: A — 4x^2 - 1
5x^2 - [2x^2 - x^2 + 1] = 5x^2 - [x^2 + 1] = 5x^2 - x^2 - 1 = 4x^2 - 1.
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✓ Correct Answer: A — 4x^2 - 1
5x^2 - [2x^2 - x^2 + 1] = 5x^2 - [x^2 + 1] = 5x^2 - x^2 - 1 = 4x^2 - 1.
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