Answer:
(x + 12)(x - 3)
Step-by-step explanation:

Answer: Heater -Rs 2400; Fan- Rs 1600
Step-by-step explanation:
Given
Ajay bought a fan and a heater for Rs 4000
Suppose the price of fan is x and that of heater is 4000-x
Profit on the fan is 
Loss on heater is 
Total profit is 7% i.e. 

Thus, the price of heater is 
Price of fan is 
Price of heater is 
Answer:
32b
Step-by-step explanation:
4(4)(2b)=16(2b)=32b