Question

$a {}^{2} - 6a + 9$
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Answer 1

Ответ:

$boxed{bold{(a=3}^{2}) }$

Объяснение:

$a^{2} - 6a + 9$

$a^{2} -6a+3^{2}$

$2ab = 2 * a * -3$

$2ab = -6a$

$a^{2} - 2ab + b^{2} = (a - b)^{2}$, $a = a$ и $b = -3$

Ответ: $boxed{bold{(a-3)^{2} }}$

Answer 2

$a^2-6a+9=a^2-2*a*3+3^2=(a-3)^2$