What must be subtracted from x3-3 x2-5 x-1 to get 2 x3-x2-4 x-2 -A- -x3-4 x2-9 x-3B- -x3-4 x2-6 x-3C- - x 3-4 x 2-9 x -9D- -x3-4 x2-9 x-3

The correct option is D x^3 4x^2+9x 3 Let the unknown be = y (x^3 3x^2+5x 1) y= 2x^3+x^2 4x+2 ⇒ y= (x^3 3x^2+5x 1) (2x^3+x^2 4x+2) nbsp; x^3 3x^2+5x 1 2x ...

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Byju's Answer

Standard VIII

Mathematics

Addition and Subtraction of Algebraic Expression

What must be ...

Question

What must be subtracted from $(x^{3} - 3 x^{2} + 5 x - 1)$ to get $(2 x^{3} + x^{2} - 4 x + 2)$ ?

$- x^{3} + 4 x^{2} + 9 x - 3$

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$- x^{3} - 4 x^{2} + 6 x - 3$

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$- x^{3} - 4 x^{2} + 9 x - 9$

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$- x^{3} - 4 x^{2} + 9 x - 3$

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Solution

The correct option is D
$- x^{3} - 4 x^{2} + 9 x - 3$

Let the unknown be $= y$

$(x^{3} - 3 x^{2} + 5 x - 1) - y = 2 x^{3} + x^{2} - 4 x + 2$

$\Rightarrow y = (x^{3} - 3 x^{2} + 5 x - 1) - (2 x^{3} + x^{2} - 4 x + 2)$

$x^{3} - 3 x^{2} + 5 x - 1$
$2 x^{3} + x^{2} - 4 x + 2$
$(-) (-) (+) (-)$
____________________
$- x^{3} - 4 x^{2} + 9 x - 3$

So we have to subtract $(- x^{3} - 4 x^{2} + 9 x - 3)$ to get the required value.

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Similar questions

What must be subtracted from $x^{3} - 3 x^{2} + 5 x - 1$ to get $2 x^{3} + x^{2} - 4 x + 2$ ?

Multiply the terms $- 3 x^{2} y^{2}, - 2 x y, 2 x^{2} y$ and verify the product for $x = 1$ and $y = 2$

Q. Evaluate

\int \frac{x^{3} + 4 x^{2} + 9 x}{x^{2} + 4 x + 9} d x

Q. Find the limits :

i .

lim x \to 1 [\frac{x^{2} + 1}{x + 100}]

i i .

lim x \to 2 [\frac{x^{3} - 4 x^{2} + 4 x}{x^{2} - 4}]

i i i .

lim x \to 2 [\frac{x^{2} - 4}{x^{3} - 4 x^{2} + 4 x}]

i v .

lim x \to 2 [\frac{x^{3} - 2 x^{2}}{x^{2} - 5 x + 6}]

v .

lim x \to 1 [\frac{x - 2}{x^{2} - x} - \frac{1}{x^{3} - 3 x^{2} + 2 x}]

Q. must be subtracted from

(x^{3} - 3 x^{2} + 5 x - 1)

to get

(2 x^{3} + x^{2} - 4 x + 2)

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What must be subtracted from (x3−3x2+5x−1) to get (2x3+x2−4x+2) ?

What must be subtracted from $(x^{3} - 3 x^{2} + 5 x - 1)$ to get $(2 x^{3} + x^{2} - 4 x + 2)$ ?