Asked by toni
how do i solve this find the root
3x^2 +21x=0
is the root 7
3x^2 +21x=0
is the root 7
Answers
Answered by
Reiny
factor it
3x(x+7) = 0
so
3x=0 or x+7=0
x = 0 or x = -7
3x(x+7) = 0
so
3x=0 or x+7=0
x = 0 or x = -7
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