Simplify the expression- x2-x-1-2x-2- 4x-1

The correct option is C x^3+7x^2+8x 1 x^2×(x 1)+[(2x+2)× 4x] 1 We need to follow BODMAS rule.= gt; Brackets (parts of a calculation inside brackets ...

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Standard VIII

Mathematics

Simplification of an Expression

Simplify the ...

Question

Simplify the expression: $x^{2} \times (x - 1) + [(2 x + 2) \times 4 x] - 1$

x^{3} + 7 x^{2} + 8 x + 1

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x^{3} - 7 x^{2} + 8 x - 1

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x^{3} + 7 x^{2} + 8 x - 1

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x^{3} + 7 x^{2} - 8 x - 1

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Solution

The correct option is C $x^{3} + 7 x^{2} + 8 x - 1$
$x^{2} \times (x - 1) + [(2 x + 2) \times 4 x] - 1$
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.
$=$ $x^{2} \times (x - 1) + [(2 x + 2) \times 4 x] - 1$
$=$ $x^{3} - x^{2} + 8 x^{2} + 8 x - 1$
$=$ $x^{3} + 7 x^{2} + 8 x - 1$

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Simplify the expression: x2×(x−1)+[(2x+2)×4x]−1

Simplify the expression: $x^{2} \times (x - 1) + [(2 x + 2) \times 4 x] - 1$