Answer:
The roots of r²+2r-8=0 are -4 and 2.
Step-by-step explanation:
Solve the given quadratic equation by factoring:
(I use factoring because it seems to be the easy one for me, thus, it will be still the answer if you use quadratic formula, completing the square and etc).
r²+2r-8=0
r²+4r-2r-8=0
r(r+4)-2(r+4)=0
(r+4)(r-2)=0
r+4=0 | r=-4
r-2=0 | r=2
Therefore, the roots of the quadratic equation which is r²+2r-8=0 are -4 and 2.
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