Express (16x+78)/(2x^2+25x+63) as two fractions

Firstly factorise the denominator to get (2x+7)(x+9). Then make the fraction equal to the seperate fractions with constants.

E.g 16x+78/2x^2+25x+63=A/(2x+7)+B/(x+9). then multiply accross by the denominator to get 16x+78=A(x+9)+B(2x+7)

the subtitute in x to make one term equal 0. e.g x=-9.to get -66=-11B therefor B=-6. then substitue in x=-7/2 to get 22=(11/2)B therfore B=4

so the answer is 4/(2x+7)+6/(x+9)

Answered by Georgia D. Maths tutor

3027 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

integrate by parts ln(x)/x^3


Explain briefly the Normal Distribution


dx/dt=-5x/2 t>=0 when x=60 t=0


Find tan(A-B) sec^2(A) - 2tan(A) = 16 && sin(B)sec^2(B) = 64cos(B)cosec^2(B)


We're here to help

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

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences