Question

The value of 16x² – 24xy + 9y² , when x =
1/4 and y = 1/5
is ____.

[a] 0 [b] –2 [c] 4 [d] 1​

Answer 1

Answer:

[c]4

Step-by-step explanation:

x²=(1/4)² =1/16

xy=(1/4)*(1/5)=1/20

y² =(1/5)² =1/25

according to question,

(16x1/16)-(24x1/20)+(9x1/25)

1-(6/5)+(9/25)={(1x25)-(6x5)+(9x1)}/25

{25-30+9}/25= -5+9=+4(answer)

Answer 2

Step-by-step explanation:

Answer:

[c]4

Step-by-step explanation:

x²=(1/4)² =1/16

xy=(1/4)*(1/5)=1/20

y² =(1/5)² =1/25

according to question,

(16x1/16)-(24x1/20)+(9x1/25)

1-(6/5)+(9/25)={(1x25)-(6x5)+(9x1)}/25

{25-30+9}/25= -5+9=+4(answer)