Question

if x is equal to 2 y is equal to -1 then the value of x square +4xy+4y square is
PL answer the question​

Answer 1

Answer:

4

Explanation:

if x = 2y, then y = x/2,

and if x = -1 then y = (-1/2)

so x² + 4xy + 4y²

= [(-1)²] + [4 × (-1) × (-1/2)] + [4 × (-1/2) × (-1/2) ]

= 1 + [(-4/1) × (-1/2)] + [ 4 × 1/4 ]

= 1 + 4/2 + 1

= 1 + 2 + 1

= 4