Question

(x + y) (x - y), if x =1/2
y=5/4​

Answer 1

Answer: PLEASE BRAINLIEST MY ANSWER

(x + y) (x - y)   =  -21/16

Step-by-step explanation:

Q) (x + y) (x - y), if x =1/2 ;y=5/4​

⇒ Given, equation (x + y) (x - y)

and  x =1/2 ;y=5/4​  

(x + y) (x - y)  =  x² -  y²  -----------[ We know the formula (a+b)(a-b)= a²-b² ]

                     =  (1/2)² - (5/4)²

                     =  1/4 - 25/16

                     =  [ (16*1) - (4*25) ] / (4*16)

                     =  [ 16 - 100 ] / (64)

                     =  [-84] / 64

(x + y) (x - y)   =  -21/16