Question

5. If x = 2, y = -1, then the value of x2 - 4xy + 4y2
is?​

Answer 1

Answer:

2x - 4xy+ 4y2

2(2) - 4(2*(-1)) + 4(-1)(2)

4 - 4(-2) + 4(-2)

4-(-8)+(-8)

4+8-8

= 4

Answer 2

Answer:

16

Step-by-step explanation:

Given = x = 2 and y= -1

x² - 4xy + 4y²

(2)² - 4×(2)(-1) +4(-1)²

4+ (-8 × -1) +4

4+8+4

=16