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=$\frac{-1}{4}$
=($\frac{4b-3}{2a}$-1
=$\frac{4(2)-3}{2(-1)}$-1
=$\frac{8-3}{-2}$-1
=$\frac{5}{-2}$-1
to continue, we can either find a common denominator or change the fraction to decimal.
Fraction to Decimal:
$\frac{5}{-2}$=-2.5
Equation=-2.5-1=-3.5
OR Common Denominator:
=$\frac{5}{-2}$$\frac{-1}{1}$×$\frac{-2}{-2}$         (denominator should be -2=common)
=$\frac{5}{-2}$+$\frac{2}{-2}$
=$\frac{7}{-2}$
which also = to -3.5