Solve x2 + 12x = –11 by completing the square. Which is the solution set of the equation? {–11, –1} {–11, 1} {11, –1} {11, 1} , PLEASE HURRY !! :( THANK YOU!

{–11, –1}

Step-by-step explanation:

hope that helps

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19NBoli

x2

Step-by-step explanation:

x2+12x+11=0

x2+(11+1)x+11=0

x2+11x+1x+11=0

x(x+11)+1(x+11)=0

(x+11)(x+1)=0

either,

x+11=0

x=-11

OR,

x+1=0

x=-1

{-11,-1}

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15

the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)