Simplify the expression — task. Maths CBSE Live product, Class 8 (2026-27).

Expand and simplify the expression: \((x + 9)(x - 1) - (x - 6)^2\)

$20 x + 45$
${2 x}^{2} + 20 x + 45$
${2 x}^{2} + 20 x - 45$
$20 x - 45$

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