Advertisements
Advertisements
Question
How much is 21a3 – 17a2 less than 89a3 – 64a2 + 6a + 16?
Solution
Required expression is 89a3 – 64a2 + 6a + 16 – (21a3 – 17a2) = 89a3 – 64a2 + 6a + 16 – 21a3 + 17a2
On combining the like terms,
= 89a3 – 21a3 – 64a2 + 17a2 + 6a + 16
= 68a3 – 47a2 + 6a + 16
So, 21a3 – 17a2 is 68a3 – 47a2 + 6a + 16 less than 89a3 – 64a2 + 6a + 16.
APPEARS IN
RELATED QUESTIONS
Subtract the second expression from the first.
(4xy − 9z); (3xy − 16z)
Solve:
(7m − 5n) − (−4n − 11m)
Solve:
(11m − 12n + 3p) − (9m + 7n − 8p)
Subtract: 13x + 12y – 5 from 27x + 5y – 43
Subtract: 3p + 5 from p – 2q + 7
Subtract:
–3p2 + 3pq + 3px from 3p(– p – a – r)
Subtracting a term from a given expression is the same as adding its additive inverse to the given expression.
Subtract the following expressions:
–4x2y – y3 from x3 + 3xy2 – x2y
Subtract the following expressions:
2(ab + bc + ca) from –ab – bc – ca
