Thursday, 2 September 2021

QUADRATICS B2

 

What must be added to x+ 8x to make the expression a perfect square?

 

Solution

 

a=1, b=8,c=?

 

We apply the formula: b2 = 4ac

 

(8)2 = 4 x 1 x c

 

64 = 4c

64 = 4c

4      4

 

16 = c


Hence number to be added is 16

 

TRY THIS……………………

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



No comments:

Post a Comment