Question

When solving quadratic equations by substitution using a calculator, what method involves replacing a variable in a quadratic equation?

a) Factoring
b) Completing the square
c) Quadratic formula
d) Substitution

Answer 1

In solving quadratic equations by substitution using a calculator, the method that involves replacing a variable in a quadratic equation is Substitution. Hence, option D is correct.

Step-by-step explanation:

When solving quadratic equations by substitution using a calculator, the method that involves replacing a variable in a quadratic equation is Substitution.

Substitution involves replacing one variable with an expression that represents the value of that variable in terms of the other variable(s) in the equation. By doing so, the equation can be simplified and solved for the remaining variable(s).

For example, if we have a quadratic equation in terms of x and y, we can substitute y with an expression that represents the value of y in terms of x, such as y = 3x + 2. Then we can substitute 3x + 2 for y in the quadratic equation and solve for x.