Question

Write the expression in standard form: 4(2a) + 7(-4b) + (3 × c × 5).

Answer 1

8a + -28b + 15 x c

just combine like terms basically.

Answer 2

Answer:
`8a-28 b+15c`

Explanation:

The given expression :
`4(2a) + 7(-4b) + (3 * c * 5).`

To write the above expression in standard form , we will simplify each term as

`4(2a)= 4*2 a = 8a` (1)

`7(-4b)=7*-4b= -28 b` (2)

`(3 * c * 5)= 3*5* c= 15c` [using commutative property] (3)

Using (1) , (2) and (3) , we get

The standard form of the given expression :

`8a-28 b+15c`