Sign In
Ask Question
Mathematics
Guest
3 April, 09:53
9x^4 + 20x^2 + 12 in quadratic form
+3
Answers (
1
)
Brenton Durham
3 April, 13:26
0
A "pure" quadratic has the form:
ax^2 + bx + c
To put this in broad, general (and crude) terms, a quadratic is:
"Some number, 'a', times a perfect square plus some number. 'b', times whatever-is being squared-next to-the-a (x) plus some other number, 'c'"
So can we make 9x^4+20x^2+12 fit this pattern? Let's look at this expression term-by-term:
9x^4
Can this be expressed as "Some number, 'a', times a perfect square"? Answer: Yes, in two ways:
9x^4 = 9 * (x^2) ^2
or
1 * (3x^2) ^2
Next
10x^2
Can this be expressed as "some number. 'b', times whatever-is being squared-next to-the-a"? The answer depends on which of the expressions we use for 9x^4.
If we use 9 * (x^2) ^2 then "whatever-is being squared-next to-the-a" would be x^2. Can we express 20x^2 as some number times x^2? Obviously yes: 20*x^2.
If we try to use 1 * (3x^2) ^2 for the 9x^4 then "whatever-is being squared-next to-the-a" would be 3x^2. Can we express 20x^2 as some number times 3x^2? Although not very obvious, the answer is yes: 20x^2 = (20/3) * 3x^2
And of course 12 can be our 'c'. So there are two ways to express 9x^4+20x^2+12 in quadratic form:
9x^4+20x^2+12 = 9 * (x^2) ^2 + 20*x^2 + 12 with the a = 9, b = 20 and the c = 12
or
9x^4+20x^2+12 = 1 * (3x^2) ^2 + (20/3) * 3x^2 + 12 with the a = 1, b = 20/3 and the c = 12.
If you really want these to look like a quadratic, then you can use a temporary variable. Make the temporary variable equal to "whatever-is being squared-next to-the-a". So for 9 * (x^2) ^2 + 20*x^2 + 12, let q = x^2. This makes the expression: 9q^2 + 20q + 12. For 1 * (3x^2) ^2 + (20/3) * 3x^2 + 12, let q = 3x^2. This m
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Get an answer to your question ✅
“9x^4 + 20x^2 + 12 in quadratic form ...”
in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers
You Might be Interested in
It took a skydiver 15 seconds to drop 450 feet. What is the rate (in feet per/second) of the skydiver's drop?
Answers (2)
The length of a base of a rectangular prism is twice the width of the base. the height of the prism is 3 times the width of a base. the surface area is 792 square centimeters. what are the dimensions of the prism?
Answers (1)
If you end up with 2=-2 when solving a linear equation in one variable, what is the equation called and what is the solution? List two ways to write the answer.
Answers (1)
Last night Davis did homework for 5/6 of an hour. He spent 1/3 of that time working on math. Which model shows the fraction of an hour he worked on math?
Answers (1)
When X=5 and y=10 in the formula A = xy-20. Find A
Answers (1)
New Questions in Mathematics
All of the guests at a school dance choose one option for their dinner - rice and chicken, the pizza, or pasta. 45% of the guests chose the rice and chicken option. 260 guests chose the pizza option. 25% of the guests chose the pasta option.
Answers (1)
Wallace received a 28 percent discount on an item priced at $275. What is the total price that he paid for it?
Answers (1)
Write 8/3 as a decimal
Answers (1)
What is 5.6 as a fraction?
Answers (2)
How many times does 12 go into 80 the times you have done 12 into 80 is when you count to 12 or 80 or do 80 or 12 jumping jacts solution that is how many times you or another kid does 12 into 80.?
Answers (1)
Home
»
Mathematics
» 9x^4 + 20x^2 + 12 in quadratic form
Sign In
Sign Up
Forgot Password?