Question

simplify (2x-y-7)^2-(2x+y+7)^2 proper explantion

Answer 1

Step-by-step explanation:

$(2x-y-7)^2-(2x+y+7)^2$

$[2x - (y + 7)]^{2} - [2x + (y + 7)] ^{2}$

$\large \pink{ \underline{ \bold{ \green{Formula :- }}}}$

$(a - b)^{2} = {a}^{2} - 2ab + {b}^{2}$

$(a + b)^{2} = {a}^{2} + 2ab + {b}^{2}$

$a = 2x \: \: \: and \: \: \: b = (y + 7)$

$\scriptsize(2x)^{2} - 2(2x)(y + 7) + (y + 7) ^{2} - [(2x)^{2} - 2(2x)(y + 7) + (y + 7)^{2} ]$

$\scriptsize4 {x}^{2} - 4x(y + 7) + {y}^{2} +2(y)(7) + {7}^{2} - [4 {x}^{2} + 4x(y + 7) +{y}^{2} +2(y)(7) + {7}^{2} ]$

$\scriptsize4 {x}^{2} - 4xy - 28y + {y}^{2} + 14y + 49 - [4 {x}^{2} + 4xy + 28y + {y}^{2} + 14y + 49 ]$

$\scriptsize4 {x}^{2} - 4xy - 28y + {y}^{2} + 14y + 49 - 4 {x}^{2} - 4xy - 28y - {y}^{2} - 14y - 49$

$\scriptsize4 {x}^{2} - 4 {x}^{2} + {y}^{2} - {y}^{2} - 4xy - 4xy - 28y - 28y + 14y - 14y + 49 - 49$

$- 8xy - 56y$

I hope it is helpful

Answer 2

Answer:

hoe it helpss you✌️✌️..