Question

Solving quadratic equations by factoring

Answer 1

r=1

Explanation:

we can start by bringing the -7 to the left:

We get 7r^2-14r+7=0

from here we can factor out 7 from the whole equation and get

7(r^2-2r+1)=0 and then divide by seven on both sides to get r^2-2r+1

after that, we can factor that into (r-1)^2=0 by special products.

therefore the answer is r=1

Answer 2

r = 1

Explanation:

7r² - 14r + 7 = 0

7(r² - 2r + 1) = 0

7(r - 1)(r - 1) = 0

r = 1