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$x_{2}−100=0$

AddEqn$LHS+100=RHS+100$

$x_{2}=100$

SqrtEqn$LHS =RHS $

$x=±100 $

CalcRootCalculate root

$x=±10$

b

$2x_{2}−162=0$

AddEqn$LHS+162=RHS+162$

$2x_{2}=162$

DivEqn$LHS/2=RHS/2$

$x_{2}=81$

SqrtEqn$LHS =RHS $

$x=±81 $

CalcRootCalculate root

$x=±9$

c