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Question

Use the BODMAS rule to simplify the expression:

xy2+x3−x[x2−x][2x]+(x−1)x2

A
x44x3x2+xy2
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B
x4+4x2x2+xy2
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C
x4+4x3+x2+xy2
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D
x4+4x3x2+xy2
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Solution

The correct option is D x4+4x3x2+xy2
xy2+x3x[x2x][2x]+(x1)x2
We need to follow BODMAS rule.
=> Brackets (parts of a calculation inside brackets always come first).
=> Orders (numbers involving powers or square roots).
=> Division.
=> Multiplication.
=> Addition.
=> Subtraction.
= xy2+x3+[x3+x2]2x+x3x2
= xy2+x3x4+2x3+x3x2
= xy2+4x3x4x2
= x4+4x3x2+xy2

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