Expand (2x + 5)(9x - 2).

Use the FOIL method:F - FIRST: the first term in either bracket, multiply: 2x(9x) = 18x2. O - OUTSIDE: the terms further from the centre of the brackets, multiply: 2x(-2) = -4x. I - INSIDE: the terms closer to the centre of the brackets, multiply: 5(9x) = 45x. L - LAST: the latter terms in either bracket, multiply: 5(-2) = -10. Now add the expressions from the four parts: 18x2 - 4x + 45x - 10 = 18x2 + 41x - 10.

AH
Answered by Aaron H. Maths tutor

3973 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve this simultaneous equation: 2 + 5y = 3x, x + y = 6


1a) Simplify 2a^3 x a^5 1b) (4x^2)^3 1c) 2(3y+1) - 3(y-4)


Solve the simultaneous equations: 3x + 2y = 4 and 4x + 5y = 17


Find the possible values of x for x^2 = 36-5x.


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