English Medium इयत्ता ९ - CBSE Question Bank Solutions

x³ - 8y³ + 27z³ +18xyz

`1/27 x^3 - y^3 + 125z^3 + 5xyz`

8x³ + 27y³ - 216z³ + 108xyz

125 + 8x³ - 27 y³ + 90xy

(3x - 2 y)³ + (2 y - 4z )³ + (4z - 3x)³

(2x - 3y)³ + (4z - 2x)³ + (3y - 4z )³

`(x/2 + y + z/3)^3 + (x/2 + (2y)/3 + z)^3 + (-(5x)/6 - y/3 - (4z)/3)^3`

(a – 3b)³ + (3b – c)³ + (c – a)³

`2sqrt2a^3 + 3sqrt3b^3 + c^3 - 3 sqrt6abc`

`3sqrt3a^3 - b^3 - 5sqrt5c^3 - 3sqrt15abc`

8x³ -125y³ +180xy + 216

`2sqrt2a^3 + 16sqrt2b^3 + c^3 - 12abc`

Three angles of a quadrilateral are respectively equal to 110°, 50° and 40°. Find its fourth angle

In a quadrilateral ABCD, the angles A, B, C and D are in the ratio 1 : 2 : 4 : 5. Find the measure of each angles of the quadrilateral

In a quadrilateral ABCD, CO and DO are the bisectors of `∠`C and ∠D respectively. Prove that

`∠`COD = `1/2` (`∠`A+ `∠`B).

The angles of a quadrilateral are in the ratio 3 : 5 : 9 : 13 Find all the angles of the quadrilateral.

Two opposite angles of a parallelogram are (3x – 2)° and (50 – x)°. Find the measure of each angle of the parallelogram .

If an angle of a parallelogram is two-third of its adjacent angle, find the angles of the parallelogram .

Find the measure of all the angles of a parallelogram, if one angle is 24° less than twice the smallest angle

ABCD is a parallelogram in which ∠A = 70°. Compute ∠B, ∠C and ∠D .