expand and simplify (x+3)(x-7)

(x+3)(x-7)

= (xx) + (x-7) + (x3) + (3-7)

= x^2 - 7x + 3x - 21

= x^2 - 4x - 21

Key here is to ensure you multiply each term in one bracket by both in the other, and to keep careful track of the signs.

LP
Answered by Luke P. Maths tutor

23713 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Find the coordinates where the curve y=x^2+6x+5 crosses the x-axis.


State the nth term of the following sequence: 3,7,11,15,19...


Solve the following simultaneous equations: 2x - y = 7 and x^2 + y^2 = 34


Work out the value of 2a^2 + b^3 when a = 5 and b = –3


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