Question

Expand using identity (a-4)2​

Answer 1

Step-by-step explanation:

let us write as

a² - 4

a² -2²

formula (a² - b²) = (a² + b²) (a² - b²)

so,

(a² + 2) (a² - 2)

therefore ans. is (a² + 2) (a² - 2)

Answer 2

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$\rm {(a - 4)}^{2}$

$\rm{using \: identity \: {(a - b)}^{2} }$

$= \rm{a}^{2} + {b}^{2} - 2ab$

$= \rm {a}^{2} + {(4)}^{2} - 2 \times a \times 4$

$= \rm {a}^{2} + 16 - 8a$

$\rm{ \color{cyan}{❤∣∣urshona∣∣❤}}$