Answer:
Part 1)
-----> solution set {7,2}
Part 2)
-----> solution set {-2,-7}
Part 3)
-----> solution set {2,-5}
Part 4)
----> solution set {2,-7}
Part 5)
----> solution set {-2,7}
Step-by-step explanation:
we know that
The formula to solve a quadratic equation of the form
is equal to
Part 1)
in this problem we have
so
substitute in the formula



The solution set is {7,2}
Part 2)
in this problem we have
so

substitute in the formula
The solution set is {-2,-7}
Part 3)
in this problem we have
so
substitute in the formula
The solution set is {2,-5}
Part 4)
in this problem we have
so
substitute in the formula
The solution set is {2,-7}
Part 5)
in this problem we have
so
substitute in the formula
The solution set is {-2,7}