Question

Es - Multiply the binomials (5x - 1) and (2x - 8).

A)
10x2 - 42x - 8
B)
10x2 - 42x + 8
o
10x2 + 38x - 8
D)
10x2 – 38x - 8​

Answer 1

Our final answer is option B that is
`10x^2-42x+8`

Explanation:

As we have to multiply the binomial.

Here is the work.

Using distributive law of multiplication.

Where
`a(b+c)=ab+ac`

⇒
`(5x-1)(2x-8)`

`5x(2x-8)-1(2x-8)`

`10x^2-40x-2x+8`...
`(-1* -8 =8)`

As
`-40x` and
`-2x` are in negative so we will add these

numbers keeping the negative sign as it is.

`10x^2-42x+8`

So the correct choice is option B that is
`10x^2-42x+8`