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What substitution should be used to rewrite 4×4 – 21×2 + 20 = 0 as a quadratic equation? u = x2 u = 2×2 u = x4 u = 4×4
Consider the equation
We have to rewrite this equation as quadratic equation.
A quadratic equation is of the form , where ‘a’, ‘b’ and ‘c’ are the real numbers.
The given equation can be expressed as ,
Let u = in the given equation, we get
is the required quadratic equation.
Therefore, u = has changed the given equation into quadratic equation.
So, Option 1 is the correct answer.
Types of Equations and Examples – ExamPlanning % – Examples of Quadratic Equations These equations contains a trigonometric function. So, first we must have to introduce the trigonometric functions to explore them thoroughly. It is an equation who have variables in the place of exponents. This can be solved using the property: ax=ay=> x = y.The substitution method is a technique for solving a system of equations. This article reviews the technique with multiple examples and some practice If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make…Learn how to use the Algebra Calculator to solve systems of equations. Example Problem. Solve the following system of equations: x+y=7, x+2y=11.