Question

Which of the following expressions is 7a-4 (2a-4) In simplest form

Answer 1

Given

we are given an expression

`7a-4(2a-4)`

Required

we need to write the above expression in simplest form.

Step-by-step explanation

We know that

`a*(b-c)=a* b-a* c`

Now the given expression is

`\begin{gathered} 7a-4(2a-4)=7a-4*(2a-4)=7a-(4*2a)-(4*(-4)) \\ =7a-8a-(-16)=-a+16\text{ } \\ \text{ } \end{gathered}`

So option a is correct.