Question

5. If x=2 y=-1, then the value of x² +4xy+4y is
A. 2
B. -1
C. 1
D. 0​

Answer 1

$\Huge\mathcal\blue{\star{\underline{\underline{Answer}}}}$

${x}^{2}+4xy+4y$

${}$

$x=2$

$y=(-1)$

${}$

$\bold{Substituting\: the\: values}$

${2}^{2}+4×2×(-1)+4(-1)$

$4-8-4$

$\cancel{4}-8-\cancel{4}$

$-8$

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Answer 2

Answer:

- 8

Step-by-step explanation:

Given,

x = 2

y = - 1

x² + 4xy + 4y

= ( 2 )² + 4 ( 2 ) ( - 1 ) + 4 ( - 1 )

= 4 + ( - 8 ) - 4

= 4 - 12

= - 8