Factorise : x^4-81 - Vidyadip

Question

Factorise : $x^4-81$

✓

Answer

$\left(x^2+9\right)(x+3)(x-3)$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[3 marks sum]" from Factorisation→Factorisation — all question types→MATHEMATICS STD 9 question papers→ICSE Board STD 9 question papers→ICSE Board question paper generator→

Similar questions

The area of a triangle is $216 cm^2$ and its sides are in the ratio 3 : 4 : 5. Find the perimeter of the triangle.

Solve for $\mathbf{x}, \log _x^{15 \sqrt{5 } }=2-\log _x^{3 \sqrt{ 5} }$

Using $(a-b)^2=\left(a^2+b^2-2 a b\right)$, evaluate :$(992)^2$

A chessboard contains $64$ equal square and the area of each square is $6.25 \ cm^2. A 2 \ cm$ wide border is left inside of the board. Find the length of the side of the chessboard.

Find the logarithm of$ : 27$ to the base $9$

Harmeet earns $Rs.50 000$ per month. He a budget for his salary as per the following table:

Expenses	Accommodation	Food	Clothing	Travel	Miscellaneous	saving
Amount $(Rs.)$	$12000$	$9000$	$2500$	$7500$	$4000$	$15000$

Draw a bar graph for the above data.

If $A=60$ and $B=30$, prove that:
$\sin ( A + B )=\sin A \cos B +\cos A \sin B$.

Rationalise the denominators of $: \frac{2 \sqrt{5} +3 \sqrt{2} }{2 \sqrt{5} -3 \sqrt{2} }$

Prove that: $(\log a)^2-(\log b)^2=\log \left(\frac{a}{b}\right) \cdot \log (a b)$

Prove that $: \frac{a+b+c}{a^{-1} b^{-1}+b^{-1} c^{-1}+c^{-1} a^{-1}}=a b c$