![fernandezvela27](/avatars/13264.jpg)
fernandezvela27
01.02.2021 •
Mathematics
ILL MAKE BRAINLIST
Evaluate: 2x[(6+1)]square2 + 1
Solved
Show answers
More tips
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
- C Computers and Internet How to Learn to Type Fast?...
- A Art and Culture Who Said The Less We Love a Woman, the More She Likes Us ?...
- F Family and Home Parents or Environment: Who Has the Most Influence on a Child s Upbringing?...
- H Health and Medicine Is it true that working with a computer is harmful to your eyesight?...
- H Health and Medicine Boosting Immunity: A Complete Guide on How to Improve Your Body’s Natural Defenses...
- P Philosophy Unidentified Flying Object - What is the Nature of this Phenomenon?...
- C Computers and Internet How to Teach Older Generations to Work with Computers?...
- G Goods and services How to Choose a Coffee Maker? The Ultimate Guide for Coffee Lovers...
- C Computers and Internet Porn Banner: What It Is and How to Get Rid Of It?...
Answers on questions: Mathematics
- M Mathematics The model below shows the number 9.99. ONES TENTHS HUNDREDTHS 9 . 9 9 Using the model of 9.99, how does the 9 in the tenths place compare to the 9 in the place to its...
- M Mathematics A form prepared periodically for each processing department summarizing the units for which the department is accountable and the units to be assigned costs and the costs...
- M Mathematics Find the volume of a pyramid with a square base, where the perimeter of the base is 13.6 cm13.6\text{ cm} 13.6 cm and the height of the pyramid is 15 cm15\text{ cm} 15...
- M Mathematics Francis makes two square pans of cornbread. He cuts one pan into 13 more pieces than the other pan. How many equal-size squares of cornbread does he cut in each pan?...
- M Mathematics Sheila is biking at a constant speed. She travels 54 meters in 9 seconds. Part A How many meters per second does Sheila travel? Part B How long in seconds would it take...
- M Mathematics Find p(7). Please help...
- M Mathematics What is the value of x? 100° O A. 70° O B. 30° O c. 170° d.10...
- M Mathematics Help pls fast and give me the steps -15a-19-35=-84...
- M Mathematics The compliment of angle A is 185° less than 2 times the supplement of angle A. what is the measure of angle A...
- M Mathematics At Robin s Snow Cones, the shaved ice portion of the cone is shaped like a perfect sphere with a diameter of 8 cm. Exactly half of the shaved ice sphere extends above...
Ответ:
roots: 2 ± (1/2)√42
-8
axis of symmetry: x = -b/(2a) is x = = 2
2(-2)
vertex: (2, f(2) ) = (2, -2(2)^2 + 8(2) + 13 ), or (2, 21)
Step-by-step explanation:
First, let's determine the roots of this quadratic, using the quadratic formula. Here the coefficients are -2, 8, 13.
Thus, the discriminant b^2 - 4ac is 8^2 - 4(-2)(13), or 64 + 104, or 168. Because the discriminant is positive, we know that there are two different real roots.
They are:
-8 ± √168 -8 ± 2√42
x = or x = = 2 ± (1/2)√42
-4 -4