Question

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

Answer 1

Answer:

a. 3x+15

b. 4x-16

c. 10x+2

D. 7x-63y

solution,

$a. \: 3(x + 5) \\ \: \: = 3 \times x + 3 \times 5 \\ \: \: = 3x + 15$

$b. \: 4(x - 4) \\ \: \: = 4 \times x - 4 \times 4 \\ \: \: = 4x - 16$

$c. \: 2(5x + 1) \\ \: = 2 \times 5x + 2 \times 1 \\ \: \: = 10x + 2$

$d . \: 7(x - 9y) \\ \: = 7 \times x - 7 \times 9y \\ \: \: = 7x - 63y$

Hope this helps..

Good luck on your assignment..

Answer 2

Answer:

a) 3(x + 5)  =

= 3x + 15

b) 4(x-4)  =

= 4x - 16

c) 2(5x + 1)  =

= 10x + 2

d) 7(x-9y) =

= 7x - 63y