418 views

### Simplify and solve the following equation: x^2 -8x +15=0

Simplify the equation first by putting the x^2 into brackets. I do this by finding two values that both multiply to get 15 and add to get -8. I can see that -3 and -5 fit this criteria, but i could easily go through each set of values until i get the ones that fit if this wasn't as obvious. I then put this into bracks with each x value, giving: (x-3)(x-5)=0. I then put each bracket equal to zero to find each x value. x-3=0 and x-5=0, meaning x= 3 and 5

11 months ago

Answered by Amira, a GCSE Maths tutor with MyTutor

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

#### 780 SUBJECT SPECIALISTS

£18 /hr

Degree: Mathematics (Bachelors) - Bath University

Subjects offered:Maths, Further Mathematics + 1 more

Maths
Further Mathematics
-Personal Statements-

“An engaging, creative and friendly tutor with 4 years experience in tutoring Maths to a broad range of ages and abilities.”

Trusted by schools

|  4 completed tutorials

£22 /hr

Degree: Biochemistry (Bachelors) - Bristol University

Subjects offered:Maths, Chemistry+ 1 more

Maths
Chemistry
Biology

“ABOUT ME: I am a biochemistry student, currently studying at the University of Bristol, and have had a passion for the natural sciences from a very young age. I am patient, hardworking and experienced, having tutored students in Maths...”

£20 /hr

Degree: Medicine A100 (Bachelors) - Liverpool University

Subjects offered:Maths, Science+ 6 more

Maths
Science
Physics
Chemistry
Biology
.UKCAT.
-Personal Statements-
-Medical School Preparation-

“Hi, I'm Chai and I'm a fifth year medical student that is passionate about helping students achieve the best of their potential!”

£18 /hr

Degree: Psychology (Bachelors) - Bristol University

Subjects offered:Maths

Maths

“I am university student at Bristol currently studying psychology. I like to think that i am hardworking and enthusiastic, especially when it comes to my work. Although i haven't had any professional experiece tutoring, I have a lot of...”

MyTutor guarantee

### You may also like...

#### Other GCSE Maths questions

Solve 5x – 2 > 3x + 11

Find the nth term of the sequence 5, 13, 21, 29

Solve the simultaneous equations: 5x + 3y = 9 and 7x - 2y = 25.

Kelly is trying to work out the two values of w for which 3w - w^3 = 2 Her values are 1 and -1 Are her values correct? You must show your working.

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this.