When a number is substituted for the same variable in two expressions, how many times must those two expressions have different values before you know they are not equivalent? Expain.

n+1

Where n is the degree of the expression

Step-by-step explanation:

Equate the expressions and form an equation.

If they are equivalent, this would be an identity

An equation can be satisfied only by the roots if not equivalent.

No. of roots depends on the degree of the equation.

So use atleast one value more than the degree.

For example, if it's a quadratic (degree 2) try 3 values of the variable

If it's a cubic (degree 3), try 4 values.

In general, if degree is n try (n+1) values of the variable

the opening of this porabola is facing up

step-by-step explanation: