Expand the following: (4x+7)(7x-2)

Using the FOIL (Firsts, Outsides, Insides, Lasts) mnemonic, you can expand these two brackets. F: 4x x 7x = 28x^2 O: 4x x -2 = -8x I: 7 x 7x = 49x L: 7 x -2 = -14 Therefore the expansion as a whole is: 28x^2 - 8x + 49x - 14 This expression can be simplified further by collecting the like terms ie. the "x" terms, giving: Answer = 28x^2 + 41x - 14

Answered by Gem P. Maths tutor

3470 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

There are 720 boys and 700 girls in a school. The probability that a boy chosen at random studies French is 2/3 The probability that a girl chosen at random studies French is 3/5. Work out the number of students in the school who study French.


Solve the simultaneous equations 8x+2y=34 and 4x+2y=18


How do you solve two simultaneous equations? (i.e. 5x + y =21 and x - 3y =9)


Prove the quadratic formula for ax^2 + bx + c = 0, where a is non 0 and a,b and c are reals.


We're here to help

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