Question

If $a=4b,c=8b^2$, and $b\ne 0$, then simplify $\frac{c-a}{4b}$.

• A. $-2b$
• B. $1-2b$
• C. $2b$
• D. $2b-1$
• E. $2b+3$

Answer 1

The correct option is D $2b-1$

Given that $a=4b$ and $c=8b^2$

So, $\frac{c-a}{4b}$

$=\frac{8b^2-4b}{4b}$

$=\frac{4b(2b-1)}{4b}$

$=2b-1$