(5m-3n)³+(5m+3n) ³ simplify
Answers
Answered by
5
Answer:
Step-by-step
(5m-3n)³+(5m-3n)³ [ using identity VII ]
=(5m)³-(3n)³-3*5m*3n(5m-3n)+(5m)³-(3n)³-3*5m*3n(5m-3n)
=125m³-27n³-45mn(5m-3n)+125m³-27n³-45mn(5m-3n)
=125m³-27n³-225m²n+135mn²+125m³-27n³-225m²n+135mn²
=250m³-54n³-450m²n+270mn². ans.
Answered by
1
Step-by-step explanation:
A boy of 1.5 metre tall runs with a speed of 3 metre per second along a straight path under a lamp hanging at a height of 3 metre,then
A)The shadow of his head moves uniformly with a speed of 3 m/s.
B)The shadow of his head moves uniformly with a speed of 4 m/s.
Similar questions