Whiz S. answered 03/14/19
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-x² - 9x = 0,
multiply with -1
x2 + 9x =0
x(x+9)=0
x=0 or x+9=0
x = or x=-9
Whiz S. answered 03/14/19
Experienced and patient Math tutor
multiply with -1
x2 + 9x =0
x(x+9)=0
x=0 or x+9=0
x = or x=-9
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