The method for solving a linear system is called
?
completing the square.
Gaussian reduction.
induction method.
.
A special case of this method is called
?
back-substitution.
negative reciprocals.
linear regression.
point-slope.
.
The special case works on systems
A) when one equation involves exactly one variable, and a second equation involves that same variable and just one other variable.
B) with more equations than unknowns.
C) having only two unknowns.
.
To reduce a system to the special form, we use
?
guess-and-check.
linear combinations.
the discriminant.
.