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Subjects>Math>Other Math

How can you solve quadratic functions by completing the square?

Gp24831842263716 ∙

Lvl 1

∙ 8y ago

Updated: 4/28/2022

x^2-16x=-15

x^2-16x+(-8)^2=-15+(-8)^2

(x-8)^2=49

(x-8)^2=+-7

8+7=15 8=7=1

The solutions are 15 and 1. You can use the example above to solve quadratic equations by completing the square.

Wiki User

∙ 8y ago

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Continue Learning about Other Math

Can all quadratics be solved by completing the square?

Completing the square is one method for solving a quadratic equation. A quadratic equation can also be solved by factoring, using the square roots or quadratic formula. Solving quadratic equations by completing the square will always work when solving quadratic equations-You can also use division or even simply take a GCF, set the quantities( ) equal to zero, and subtract or add to solve for the variable

Why do you use square roots to solve quadratic equations?

Because it's part of the quadratic equation formula in finding the roots of a quadratic equation.

Can you give me an example of a real life situation involving quadratic functions?

Quadratic functions will be used in chemistry in real life. Quadratic equations are used to solve equilibrium problems and determine the amount of reactants in a mixture that will react and the concentrations of products that will be form.

X2 plus 11x plus 11 equals 7x plus 9?

X2+11x+11 = 7x+9 X2+11x-7x+11-9 = 0 x2+4x+2 = 0 Solve as a quadratic equation by using the quadratic equation formula or by completing the square: x = -2 + or - the square root of 2

How do you solve by completing the square?

The related link "Purple Math" has an in depth explanation.

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