Question

2(r^2+1)=5r

Answer 1

any idea how to solve this?

Answer 2

Distribute the 2 first

Answer 3

then i get 2r^2+2=5r

Answer 4

Right now get the 5r to the left side and then factor

Answer 5

ok

Answer 6

2r^2-5r+2=0

Answer 7

i get 2r^2-5r+2=0, but there arent any factors of 2 that add up to 5

Answer 8

When the coefficient of the x^2 isnt 1 you do the number in front of x^2 times the last number and find factors of that

so 2*2=4

-4 and -1 could get -5 and also multiply to get 4.

2r^2-4r-r+2=0

Answer 9

(2r-1)(r-2)=0

can you solve from here?

Answer 10

i can solve from here. thank you for your help!