PERFECT SQUARES 1

What must be added to x²  + 14x to make the expression a perfect square?

Solution

a=1, b=14,c=?

b² = 4ac

(14)² = 4 x 1 x c

196 = 4c

196 = 4c

 4       4

49 = c

Hence number to be added is 49

TRY THIS……………………

What must be added to x²  + 32x to make the expression a perfect square?