Secondary School (English Medium) (5 to 8) इयत्ता ७ - CBSE Question Bank Solutions

Subtract the following expressions:

–2a² – 2b² from –a² – b² + 2ab

Subtract the following expressions:

x³y² + 3x²y² – 7xy³ from x⁴ + y⁴ + 3x²y² – xy³

Subtract the following expressions:

2(ab + bc + ca) from –ab – bc – ca

Subtract the following expressions:

4.5x⁵ – 3.4x² + 5.7 from 5x⁴ – 3.2x² – 7.3x

Subtract the following expressions:

11 – 15y² from y³ – 15y² – y – 11

What should be subtracted from 2x³ – 3x²y + 2xy² + 3y³ to get x³ – 2x²y + 3xy² + 4y³?

What should be subtracted from –7mn + 2m² + 3n² to get m² + 2mn + n²?

How much is 21a³ – 17a² less than 89a³ – 64a² + 6a + 16?

How much does 93p² – 55p + 4 exceed 13p³ – 5p² + 17p – 90?

To what expression must 99x³ – 33x² – 13x – 41 be added to make the sum zero?

Subtract 9a² – 15a + 3 from unity.

If A = 3x² – 4x + 1, B = 5x² + 3x – 8 and C = 4x² – 7x + 3, then find:

(A + B) – C

If A = 3x² – 4x + 1, B = 5x² + 3x – 8 and C = 4x² – 7x + 3, then find:

B + C – A

If A = 3x² – 4x + 1, B = 5x² + 3x – 8 and C = 4x² – 7x + 3, then find:

A + B + C

If P = –(x – 2), Q = –2(y + 1) and R = –x + 2y, find a, when P + Q + R = ax.

From the sum of x² – y² – 1, y² – x² – 1 and 1 – x² – y² subtract –(1 + y²).

Subtract the sum of 12ab – 10b² – 18a² and 9ab + 12b² + 14a² from the sum of ab + 2b² and 3b² – a².

Translate the following algebraic expression:

4b – 3

For any two non-zero rational numbers x and y, x⁵ ÷ y⁵ is equal to ______.

Cube of `((-1)/4)` is ______.