Question

$(x - 2y) {}^{2} + 4x - 8y$
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Answer 1

$\red {\huge {\underline{ \frak{Your \: answEr : }}}}$

$\implies$ (x - 2y)² + 4x - 8y

$\implies$ (x)² + (2y)² - (2 × x × 2y) + 4x - 8y

$\implies$ x² + 4y² - 4xy + 4x - 8y

$\large\implies$ x² + 4y² - 8y - 4x(y - 1)

$\huge{\red{\ddot{\smile}}}$