Question

Pls answer this question if u have studied quadratic equations chapter

Answer 1

Answer:

Because They multiplied 2 so they had to divide 2 as well. Maybe for further  calculation

Answer 2

IF YOU KNOW THE IDENTITY OF ( A + B )² THEN YOU WILL FIND THAT THE MIDDLE TERM IS MULTIPLIED BY 2 SO IN THE ABOVE EQUATION TO BALANCE IT COMPLETELY 2 IS MULTIPLIED IN DENOMINATOR AS THAT WHOLE METHOD WORKS ASSUMPTION OF THE MIDDLE TERM TO CONVERT IT INTO A IDENTITY FORM.

HOPE I AM ABLE TO HELP YOU.

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