Question

क्या x=3 समीकरण x-5x+7 का हल है?

Answer 1

x-5x+7.......(1)

put x=3 in (1)

x-5x=-7

3-5(3)=-7

3-15=-7

-12=-7

12≠7

so,it is not correct

Answer 2

Answer:

so let p (x) = x-5x+7

then , p (3) = 3 - 5(3) + 7

= 3 - 15 + 7

= -5

Hope this is the right answer. ...