Answer:
The sum of the roots is 0.5
Step-by-step explanation:
<u><em>The correct question is</em></u>
What is the sum of the roots of 20x^2-10x-30
we know that
In a quadratic equation of the form
The sum of the roots is equal to
in this problem we have
so

substitute
<u><em>Verify</em></u>
Find the roots of the quadratic equation
The formula to solve a quadratic equation is equal to


substitute





The roots are x=-1 and x=1.5
The sum of the roots are
----> is ok
Answer:
D) (x+2) (x+2)
Step-by-step explanation:
Answer:
x= 1 and y= 6
Step-by-step explanation:
M 7=280. you just multiply 7 by 40 to get your answer. i am pretty sure.