The product of some negative number and 10 less than three times that number is 8 . find the num

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asked Dec 21, 2017 160k views

1 Answer

Algife · Answer 1 · 2017-12-24T20:55:22+0000

-x(3x-10)=8
-3x^2+10x=8 (DISTRIBUTE)
-3x^2+10x-8=0 (BALANCE TO ZERO)
(-3x+4)(x-2)=0 (FACTOR)
(-x+4/3)(x-2)=0 (SIMPLIFY)
{x=2 OR x= 4/3}