39 quadratic equation worksheet and answers

I've noticed that when working out quadratics I cannot seem to be able to substitute the possible values I work out for x into the equation I work them out for. For example: 2x\^2 + 7x + 3 = 0 I work out that x could be both -1/2 and -3 using the quadratic equation. I then try replacing x with -1/2, getting 2\*(-1/2\^2) + (7\*-1/2) + 3 = -1 When I replace x with -3 I get 2\*(-3\^2) + (7\*-3) + 3 = -36 ​ I decided to sketch the graph to see how that compares to my numbers. I com... Hey guys! I'm practicing math today and i'm currently working through bonus questions on my textbook which, unfortunately, doesn't leave an answer key. Can someone solve this one for me? I'll answer myself but I don't know if i'd be right if there's no key given. **The problem:** "The Eiffel tower in Paris, France is 1063 ft tall. How many seconds will it take an object, with negligible air resistance, to fall from the top? Note: The formula s = 16t^(2) is used to approximate the distance s, i...

Suppose one of the roots of the quadratic equation x^2 + 6ax + b = 0 is √ (3 + √8). If a and b are rational numbers, what is the value of 15ab?

Quadratic equation worksheet and answers

I'm working through the [McGraw-Hill Education Algebra II Review and Workbook](https://www.amazon.com/McGraw-Hill-Education-Algebra-Review-Workbook/dp/1260128881/) and came to the section on completing the square. And despite trying for two days, my answers still do not match the ones in the book. I took a break in between, and went through two other sources: 1. TheOrganicChemistryTutor - Completing the square 2. 1,001 Precalculus Problems for dummies. And despite my answers all matching up ... 70$

Quadratic equation worksheet and answers. 70$ I'm working through the [McGraw-Hill Education Algebra II Review and Workbook](https://www.amazon.com/McGraw-Hill-Education-Algebra-Review-Workbook/dp/1260128881/) and came to the section on completing the square. And despite trying for two days, my answers still do not match the ones in the book. I took a break in between, and went through two other sources: 1. TheOrganicChemistryTutor - Completing the square 2. 1,001 Precalculus Problems for dummies. And despite my answers all matching up ...

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