aldersontr aldersontr
  • 09-02-2021
  • Mathematics
contestada

How is this solved?
r2 + 2r = 80

Respuesta :

DeepakThakur
DeepakThakur DeepakThakur
  • 09-02-2021

Answer:

8,-10

Step-by-step explanation:

r²+2r=80

r²+2r-80=0

r²+(10-8)r-80=0

r²+10r-8r-80=0

r(r+10)-8(r+10)=0

(r-8)(r+10)=0

either, or,

r-8=0 r+10=0

r=8 r=-10

Answer Link

Otras preguntas

What happens when a baby dies in the mothers womb do the docters just take the baby out? Or do they have to do a pressideur?
This image shows the Mid-Atlantic Ocean Ridge, which is completely submerged at the bottom of the Atlantic Ocean. What is true about this underwater mountain ra
Easy math for the cool people (you, your )
The auditorium where the spring musical will be performed has 10 seats in the 1st (front) row. Each row behind the Ist row has 4 more seats than does the row in
The ratio of blue skittles to red skittles in Tayler's bag is 3 to 4. If there are 20 red skittles in Tayler's bag, how many total skittles does Tayler have? *
Evaluate the expression
4r + 10 = -26 What is the answer
Give your reflection and understanding to Psalm 33: 1-2, 20-22.​
1. 3 · h for h = 5 2. 4 – f for f = 1 3
wich of the following is a true statment A. only pulling exhibit work B. pushing or pulling something to move it is work C. pushing or pulling something to move
good job