![lallenma](/avatars/41151.jpg)
lallenma
11.04.2021 •
Mathematics
Use factoring to solve quadratic equation. Check by substitution or by a graphing utility. 4x^2=19x+30
Solved
Show answers
More tips
- F Food and Cooking 10 Tips for Proper Sushi Consumption...
- H Health and Medicine Want to Lose Weight? Gain Muscle without Damaging Your Health!...
- F Family and Home Parquet or laminate, which is better?...
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
- T Travel and tourism Maldives Adventures: What is the Best Season to Visit the Luxurious Beaches?...
- H Health and Medicine Kinesiology: What is it and How Does it Work?...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
Answers on questions: Mathematics
- M Mathematics You need exactly 47 bottles of water. You don’t want to buy more than you need, but you want the least expensive way. List the best way to buy exactly 47 bottles of...
- M Mathematics What is the most specific name for the figure? P(0,0) Q(0, 2a) R(2b, 2a) S(2b, 0) A. Parallelogram B. Rectangle C. Square D. Rhombus...
- B Biology Somon hl fat willl mark...
- H Health Which is the best description of obesity? 1) a person is obese if he or she has an excess amount of body fat. 2) an obese person s weight is above the standard weight...
- S Social Studies You are working with a specific enzyme-catalyzed reaction in the lab. you are a very careful experimentalist, and as a result, at the beginning of each of your experiments,...
Ответ:
Multiply 4 x -30 = -120
Now find two factors of 120 that subtract to give 19... 1 x 120, 2 x 60, 3 x 40, 4 x 30, 5 x 24 ✅
[if it had been +120 we would add the factors looking for 19 which in this case don’t exist]
To get -19 we will need 5 + -24
24 is a multiple of 4 so we can use 4 x -6 and 1 x 5
Giving a factored equation of (4x + 5)(x - 6) = 0 [you should check this by expanding to remove the brackets]
One of the brackets must = zero so the solutions are x = -5/4 or x = 6
Some people look at factors of 4 and -30 and then pair then up to find a sum of -19 but this can take longer to finish.
Ответ:
26.226
Step-by-step explanation: