Math

Factor and solve: -1x^2 + 10x - 21 = 0

Asked by AnneS2 on 01 Aug 12:57

Last updated by anonymous on 03 Aug 15:09

1 Answers

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Answered by CherieS on 03 Aug 15:09

-1x^2 + 10x - 21 = 0

-1(x^2-10x+21)=0

-1(x )(x ) ( -7)( -3)=0

-1(x-7) (x-3) = 0

Solve:

-1(x-7)=0

-1(x) (-1)(-7)=0

-1x+7=0

-1x+7-7=0-7

-1x=-7

-1x/-1=-7/-1

x=7

Solve:

-1(x-3) = 0

-1(x) (-1)(-3) = 0

-1x+3=0

-1x+3-3=0-3

-1x=-3

-1x/-1=-3/-1

x=3