Question

Please tell me solution of this​

Answer 1

Answer:

{i }area of rectangle= length * breadth

=25a^2+35a+12

=25a^2+20a+15a+12

=5a(5a+4)+3(5a+4)

=(5a+3)+(5a+4)

so, possible length is (5a+3) and possible breadth is (5a+4)

{ii} area of rectangle= length * breadth

=35y^2+13y-12

=35y^2+28y-15y-12

=7y(5y+4)-3(5y+4)                    

= (5y+4)(7y-3)                            

so, possible length is (5y+4) and possible breadth is (7y-3)

Answer 2

Age of Aftab = x-7

Age of his daughter = y-7

According to the question,

x−7 = 7(y−7)

⇒x−7 = 7y−49

⇒x−7y = −42 ………………………(i)

Also, three years from now or after three years,

Age of Aftab will become = x+3.

Age of his daughter will become = y+3

According to the situation given,

x+3 = 3(y+3)

⇒x+3 = 3y+9

⇒x−3y = 6