Expand the brackets (2x + 3)(3x - 1)

Use the crab claw method to expand the bracket. Draw two lines above the equation from the 2X, one to the 3X and one to the -1. Draw another two lines below the equation from the +3, one to the 3X and one to the -1. Now multiply the parts that are linked: 2X x 3X = 6X2, 2X x -1 = -2X, 3 x 3X = 9X, 3 x -1 = -3. Now add them together: 6X2 - 2X + 9X - 3 which simplifies to 6X2 + 7X - 3

CM

Related Maths GCSE answers

All answers ▸

Differentiate y = 3x^4 + 6x^3


A stationary ball starts rolling down a hill, and after 5s it reaches a speed of 12m/s. From here the ground levels off, and the ball continues at this speed for 3 more seconds. Plot this on a velocity-time diagram.


How do you convert fractions to decimals? For example. Convert 13/20 to a decimal.


how do I solve the equation x^2 + 7x + 11 = 0, to 3dp?