Question

Find the following when a = -1, b = 2, c = -1/4
(4b - 3)/(2a) -1

Answer 1

We substitute the given into the equation
given: a=-1, b=2, c=
`(-1)/(4)`
=(
`(4b-3)/(2a)`-1
=
`(4(2)-3)/(2(-1))`-1
=
`(8-3)/(-2)`-1
=
`(5)/(-2)`-1
to continue, we can either find a common denominator or change the fraction to decimal.
Fraction to Decimal:

`(5)/(-2)`=-2.5
Equation=-2.5-1=-3.5
OR Common Denominator:
=
`(5)/(-2)`
`(-1)/(1)`×
`(-2)/(-2)` (denominator should be -2=common)
=
`(5)/(-2)`+
`(2)/(-2)`
=
`(7)/(-2)`
which also = to -3.5