Factorise and solve (x^2) - 8x + 15 = 0.

Factorise means to put into brackets and solve means to find values of x that make the equation true.We need to find two numbers that multiply to make 15 and add together to make -8. They both need to be negative numbers to get negative 8 and positive 15 (as a negative multiplied by a negative gives a positive). So, it will be (x-5)(x-3)=0.Now, set each bracket to equal 0. x-5=0 and x-3=0Solve to get x equals by adding 5 and 3 to both sides.Therefore, x=5 and x=3.

Answered by Libby C. Maths tutor

2348 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

y=6x+9 , 3y-18x+9=0 Are these lines parallel?


Fully factorise and simplify (x^2 +7x + 10) / (x^2 - 25)


if you have an isosceles triangle, one angle of 140 degrees what are the other two?


Work out (2^34) / (2^3)^10


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences