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

89a3 – 64a2 + 6a + 16 – (21a3 – 17a2)= 89a3 – 64a2 + 6a + 16 - 21a3 + 17a2= 68a3 – 47a2 + 6a + 16

Q61 of 100 Page 312

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

89a³ – 64a² + 6a + 16 – (21a³ – 17a²)

= 89a³ – 64a² + 6a + 16 - 21a³ + 17a²

= 68a³ – 47a² + 6a + 16

(a) What should be added to x³ + 3x²y + 3xy² + y³ to get x³ + y³?

(b) What should be added to 3pq + 5p²q² + p³ to get p³ + 2p²q² + 4pq?

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

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

How much is y⁴ – 12y² + y + 14 greater than 17y³ + 34y² – 51y + 68?

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