Question

Factories each of the following expression by splitting the middle terms 84_2r_2rsquare

Answer 1

Answer:

-7,6

Step-by-step explanation:

84-2r-2r^2=0

-2(r^2+r-42)=0

r^2+7r-6r-42=0

r(r+7)-6(r+7)=0

(r+7)(r-6)=0

r=-7,6