Question

Simplify -b/2a where a =-8 and b =-1

Answer 1

The correct value of this algebraic expression is -1/16

             

Given the expression, $\large \sf \dfrac{-b}{2a}$, let's just: change the letters to the numbers and then perform the given operations.

• According to the rules of signals, we will have to:

*Equal signs will be positive ⇒ (-) (-)= + & (+) (+) = +

*Different signs will be negative ⇒ (-) (+) = - & (+) (-) = -

$\\\large \sf \dfrac{-b}{2a} , \ a=-8 \ , \ b=-1$

$\large \sf \dfrac{-(-1)}{2 \cdot (-8)}$

$\large \sf \dfrac{1}{2 \cdot (-8)}$

$\large \sf \dfrac{1}{-16}$

$\blue{\boxed{\large \sf -\dfrac{1}{16} }}$

Therefore, the final answer to this simplification will be -1/16