Solve the quadratic equation 3x^2 + x – 5 = 0 give answers to 3 decimal places

MYTUTOR SUBJECT ANSWERS

Answers / Maths / GCSE / Solve the quadratic equation 3x^2 + x – 5 = 0 give answers to 3 decimal places

1170 views

Solve the quadratic equation 3x^2 + x – 5 = 0 give answers to 3 decimal places

To solve this quadratic equation we should first see if it is possible to factorise it into two seperate brakets. In this case there are no numbers which multiply to give -5 and add to give 3. Thus we should resort to using the quadratic formula which is used when equations cannot be solved by inspection. The quadratic formula is x=(-b+-(b²-4ac)^1/2)/2a. Values for a,b and c can be lifted from the question. ax²+b-c=0 so in this question a=3 b=1 and c=-5. Inputing these into the equation will give two results. The answers are x=1.135 or x=-1.468 both of these answers make the original equation true.

2 years ago

Answered by David, a GCSE Maths tutor with MyTutor

Still stuck? Get one-to-one help from a personally interviewed subject specialist

654 SUBJECT SPECIALISTS

Scott R. GCSE Maths tutor, 13 Plus Maths tutor, A Level Maths tutor,...

View profile

£24 /hr

Scott R.

Degree: PGCE Secondary Mathematics (Other) - Leeds University

Subjects offered:Maths, Further Mathematics

“I am currently completing 2 PGCEs in Leeds. I have always had a passion for maths and my objective is to help as many as possible reach their full potential.”

5.0

38 reviews | 98 completed tutorials

Save profile

Sophie H. A Level Maths tutor, GCSE Maths tutor

View profile

£22 /hr

Sophie H.

Degree: Mathematics (Masters) - Bristol University

Subjects offered:Maths, Further Mathematics

“I’ll help anyone finding maths hard. I still struggle now, it's not meant to be easy! Be at my tutorial or (c^2-a^2) <- a maths joke, I apologise.”

5.0

32 reviews | 64 completed tutorials

Save profile

Hinsum W. A Level Chemistry tutor, A Level Biology tutor, GCSE Maths ...

View profile

£22 /hr

Hinsum W.

Degree: Medicine (Bachelors) - Edinburgh University

Subjects offered:Maths, Chemistry+ 3 more

“I'm a 3rd year Edinburgh medic currently intercalating in Anaesthesia. I am a seasoned tutor and can improve your exam technique and subject knowledge!”

5.0

86 reviews | 147 completed tutorials

Save profile

See more GCSE Maths tutors

About the author

View profile

David R.

Currently unavailable: for regular students

Degree: Economics and Management (Bachelors) - Bristol University

Subjects offered:Maths

“I am currently reading economics at Bristol University. I have always thoroughly enjoyed mathematics and hope to be able to instill that same enthusiasm in you too. I am a patient person. I have coached hockey for children aged 5 to 1...”

MyTutor guarantee

Save profile

Version:	3.49.4
Build:	b2e05e7dfef3
Time:	2017-08-18T11:35:22Z

MYTUTOR SUBJECT ANSWERS

Solve the quadratic equation 3x^2 + x – 5 = 0 give answers to 3 decimal places

Still stuck? Get one-to-one help from a personally interviewed subject specialist

654 SUBJECT SPECIALISTS

About the author

You may also like...

Other GCSE Maths questions

One-to-one help is at your fingertips