(3q + 7p2 – 2r3 + 4) – (4p2 – 2q + 7r3 – 3) = ?

After solving the bracket,we get,= 3q + 7p2 – 2r3 + 4 – 4p2 + 2q – 7r3 + 3 = 7p2 – 4p2 + 3q + 2q – 2r3 – 7r3 + 3 + 4= 3p2 + 5q – 9r3 + 7

Q2 of 95 Page 94

(3q + 7p² – 2r³ + 4) – (4p² – 2q + 7r³ – 3) = ?

After solving the bracket,

we get,

= 3q + 7p² – 2r³ + 4 – 4p² + 2q – 7r³ + 3 = 7p² – 4p² + 3q + 2q – 2r³ – 7r³ + 3 + 4

= 3p² + 5q – 9r³ + 7

If x – y = 7 and xy = 9, find the value of (x² + y²).

The sum of (6a + 4b – c + 3), (2b – 3c + 4), (11b – 7a + 2c - 1) and (2c – 5a - 6) is

(x + 5) (x - 3) = ?

(2x + 3)(3x - 1) = ?