Question

help???
Darrell tried to solve the equation x2 + 10x = -9 by completing the square.


His work and some of his answers are shown below. Each red blank, marked with a letter A, should be filled in with the same number.


Each blue blank, marked with the letter B, should be filled in with the same expression.


Each green blank, marked with the letter C, should be filled in with the same number.



Enter the number, expression, and number that fill in blanks A, B, and C correctly. Separate your answers with commas, like this: 42, 3x-4, 53

Answer 1

do you have a clue on how to do this problem?

Answer 2

nope not at all

Answer 3

ok, first do you think x^2+10 can be factor?

Answer 4

I mean the x^2+10x

Answer 5

yes if it was equal to 0

Answer 6

yes you can even the equal is =-9.. it should be like this if you factor it x(x+10)=-9

Answer 7

you want me to do the rest? or you want to try to find B and C?

Answer 8

can you do it i have not idea how to solve it

Answer 9

so -9 was A?

Answer 10

you factor the x^2+10x and it showed as x(x+10x) so the A would be 10

Answer 11

okay

Answer 12

okay I'll do the rest then

x^2+10x=-9
X(x+10)=-9
-10 -10
x(x)=-9-10
x(x)= -19
x^2=-19
sqrt(x^2) = sqrt (-19)
x=sqrt(-19)

Answer 13

so A= 10, B= x^2, and C= -19

Answer 14

thank you!

Answer 15

no problem, hope this explanation helps you understand it :)