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Question

Reduce the following expression using BODMAS rule: 2y1(yy2)+5y[(2y)(y21)]

A
10y4+11y2+y
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B
10y4+11y2y
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C
10y4+11y2+y
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D
10y411y2+y
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Solution

The correct option is C 10y4+11y2+y
2y1(yy2)+5y[(2y)(y21)]
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.
= 2yy+y2+5y[2y3+2y]
= y+y210y4+10y2
= 10y4+11y2+y

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