PERFECT SQUARES 1

What must be added to x²  + 12x to make the expression a perfect square?

Solution

a=1, b=12,c=?

b² = 4ac

(12)² = 4 x 1 x c

144 = 4c

144 = 4c

 4       4

36 = c

Hence number to be added is 36

TRY THIS……………………

What must be added to x²  + 16x to make the expression a perfect square?