x^2 - 5x - 12 = 2, solve for x

RHS should always be 0 so start by taking that across.Now we want two numbers, they need to add up to make - 5 and multiply to make -14.Solve for this and we get -7 and +2.Use this information to factorise: (x - 7)(x + 2) = 0One or the other bracket must equal 0 for this to be true, so x must equal 7 or - 2.Then go on to explain quadratic formula for cases where factorisation is not so easy.

PS
Answered by Pratinav S. Maths tutor

3206 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Write 156 as a product of its prime factors.


Solve x^2 = 4(x - 3)^2


Calculate the length of the hypotenuse of a right-angled triangle when the other two sides measure 6cm and 9cm.


Prove algebraically that the straight line with equation x = 2y + 5 is a tangent to the circle with equation x^(2) + y^(2) = 5


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences