Solve the equation x^3-5x^2+7x-3=0

First start by considering the x0 coefficient which is -3. These include ±3 and ±1. Substituting x=1 into the polynomial produces an answer of 0 which shows that x=1 is a factor of the polynomial. Therefore x3-5x2+7x-3 = (x-1)(ax2+bx+c). As the x^3 coefficient =1, a must therefore also =1. -c =-3 as the x0 coefficient is 3, so c =3 and equation x coefficients gives 7=-b+c so b=-4. Factorising x2 -4x+3 gives (x-3)(x-1). The solutions of the equation are therefore x=1 and x=3.

AL
Answered by Annabelle L. Maths tutor

7854 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Given that y is directly proportional to square root of x and that y = 20 when x = 49 find an expression to represent x and y.


Given that f(x ) = 4x^3 + 12, evaluate f ( −2) .


Block 1 is 24mm long. Block 2 is 32mm long. Vignesh joins some type 1 blocks together to make a straight row. He then joins some type 2 blocks together to make a straight row of the same length. (a) Write down the shortest possible length of this row.


Rearranging formulae


We're here to help

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

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning