We substitute the given into the equation
given: a=-1, b=2, c=

=(

-1
=

-1
=

-1
=

-1
to continue, we can either find a common denominator or change the fraction to decimal.
Fraction to Decimal:

=-2.5
Equation=-2.5-1=-3.5
OR Common Denominator:
=


×

(denominator should be -2=common)
=

+

=

which also = to -3.5
A + B + C = 180
<span>C = 180 - A - B </span>
The answer is that it's a right triangle. One angle is 90°
Answer:
your answer will be y-b because it is common in all the expression