If r1
and
r2
are the roots of
ax2 + bx + c = 0,
show that
r1r2 =
c
a
.
If
r1
and
r2
are roots of
ax2 + bx + c = 0,
then their values are
r1 =
−b +

b2 − 4ac
2a
and
r2 =
−b −

b2 − 4ac
2a
r1r2
=

+

b2 − 4ac
2a

·

−b −

b2 − 4ac
2a

=

+

b2 − 4ac

·

−b −

b2 − 4ac

4a2
=

2

−

b2 − 4ac
2

4a2
=

− (b2 − 4ac)
4a2

=

4a2

=

c
a

Afootball quarterback has two more chances to throw a touchdown before his team is forced to punt the ball. he misses the receiver on the first throw 25% of the time. when his first throw is incomplete, he misses the receiver on the second throw 15% of the time. what is the probability of not throwing the ball to a receiver on either throw?

Rewrite the expression in z to the n power. the expression i was given is: 1 over z to the negative 1 half power.

Find the product. type your answer in the space provided. use / for a fraction bar (example: 1/2) and ^ for an exponent (example: x^5). do not put spaces in your answer. (x -1 y 5)^2 · (2xy -2)^5