Calculate: 7(a-2)-(1+2a)

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Expression: $7\left( a-2 \right)-\left( 1+2a \right)$

To find the roots of the polynomial, set the expression equal to $0$

$7\left( a-2 \right)-\left( 1+2a \right)=0$

Solve the equation for $a$

$a=3$

The root of the polynomial is the solution of the corresponding polynomial equation

$3$

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