Question

The expression to be added in (5x2 - 7x + 2) to produce (7x2-1)​

Answer 1

Answer:

let the number to be added be x

so

(5*2-7*2) + x = (7*2 -1)

10-14 + x = 14-1

-4+x=13

x=13/-4

x= -13/4

this is your answer. so this has to be added