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likoan [24]
3 years ago
9

Rewrite the function by completing the square f(x)=x ^2 +4x−60

Mathematics
1 answer:
zhuklara [117]3 years ago
5 0

Hi there! :)

\large\boxed{f(x) = (x + 2)^{2}  - 64}

f(x) = x² + 4x - 60

Rewrite:

0 = x² + 4x - 60

Complete the square by creating a perfect square trinomial. Make sure to add the third term to both sides:

0 + 4 = (x² + 4x + 4) - 60

Rewrite the trinomial as a square binomial:

4 = (x + 2)² - 60

Subtract 4 from both sides:

0 = (x +2)² - 64

Rewrite:

f(x) = (x + 2)² - 64

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Please solve this thank you!
SSSSS [86.1K]

Answer:

1024x^{40}

Step-by-step explanation:

So the first step is to add like terms since you can simplify the numerator by adding the two values sine they have the same variable and degree.

Add like terms:

[\frac{8x^9}{2x}]^5

Divide by 2x (divide coefficient by 2, subtract coefficient degrees)

[4x^8]^5

Multiply exponents and raise 4 to the power of 5

1024x^{40}

The reason you multiply exponents is because you can think about it like this:

(4 * x * x * x * x * x * x * x * x) (this has one 4 and 8 x's because x is raised to the power of 8. Now if you do that 5 times which is what the exponent is doing you're going to have 40 x's and 8 4's. So it's essentially

(4 * x * x * x * x * x * x * x * x) * (4 * x * x * x * x * x * x * x * x) * (4 * x * x * x * x * x * x * x * x) * (4 * x * x * x * x * x * x * x * x) * (4 * x * x * x * x * x * x * x * x). If you group like terms you'll get (4 * 4 * 4 * 4 * 4) *  (x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x * x). Which simplifies to 4^5 * x ^ (8 * 5) which further simplifies to the answer 1024x^40

6 0
2 years ago
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