Ch. 1A linear equation in a single variable x has form: ax=bIf not, its a nonlinear equation in 1 variable.Ex: ax2+bx +c=0 less than or equal to 2 solutions sin(x)=0 infinite number of solutionsax5+bx4+cx3+dx2+ex+f=0 5 or less solutions, no quadratic formulas for this
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Quadratic equation, Elementary algebra, Quintic equation, infini te number