Question

hey guys please don't give wrong answers if you know then you give answer please someone help me out please l request you all
(2x + y - 1 )^3 anyone genius help ​

Answer 1

Answer:

$\huge{\underline{\underline{\mathrm{\color{red}{ÂñẞwËr}}}}}$

${8x}^{3} + 12 {x}^{2} y + 6x {y}^{2} + {y}^{3} - 12{x}^{2} - 12xy \\ = \: \: \: \: \: \: \: \: \: \: - 3 {y}^{2} + 6x + 3y - 1$

Answer 2

Step-by-step explanation:

We know that :-

(a + b + c)³ = a³ + b³ + c³ + 3(a+b)(b+c)(c+a)

(2x + y - 1)³

[2x + y + (-1)]³

(2x)³ + (y)³ + (-1)³ + 3 (2x + y) (y - 1) (-1 - 2x)

8x³ + y³ - 1 + 3 (2x + y) (y - 1) (-1 - 2x)

8x³ + y³ - 1 + (6x + 3y) (-y - 2xy + 1 + 2x)

8x³ + y³ - 1 - 6xy - 12x²y + 6x + 12x² - 3xy - 6xy² + 3y + 6xy

8x³ + y³ - 1 - 12x²y + 6x + 12x² - 3xy - 6xy² + 3y