Question

if a pen costs rs. (3a-b)and if you buy a (3a+b)pens how much will you pay to the shoopkeeper​

Answer 1

Answer:

cost of 1 pen = (3a-b)

cost of (3a+b) pens = (3a+b)(3a-b)

                             $so,(a+b)(a-b)=a^{2} -b^{2}$

now appliying the identity

                             $so,(3a+b)(3a-b)\\(3a)^{2} -b^{2}\\9a^{2} -b^{2}$

Step-by-step explanation:

pls mark brainliest

Answer 2

Step-by-step explanation:

The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion