Question

Expand the following:
a) 3(x + 5)
b) 4(x-4)
c) 2(5x + 1)
d) 7(x-9y)

Answer 1

a) 3(x + 5) =

= 3x + 15

b) 4(x-4) =

= 4x - 16

c) 2(5x + 1) =

= 10x + 2

d) 7(x-9y) =

= 7x - 63y

Answer 2

a. 3x+15

b. 4x-16

c. 10x+2

D. 7x-63y

solution,

`a. \: 3(x + 5) \\ \: \: = 3 * x + 3 * 5 \\ \: \: = 3x + 15`

`b. \: 4(x - 4) \\ \: \: = 4 * x - 4 * 4 \\ \: \: = 4x - 16`

`c. \: 2(5x + 1) \\ \: = 2 * 5x + 2 * 1 \\ \: \: = 10x + 2`

`d . \: 7(x - 9y) \\ \: = 7 * x - 7 * 9y \\ \: \: = 7x - 63y`

Hope this helps..

Good luck on your assignment..