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Question: Math

Factor and solve: -1x^2 + 4x + 21 = 0

In Math | Asked by AnneS2
Answers

-1x^2 + 4x + 21 = 0

-1( x^2- 4x - 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

CherieS | 189 days ago