Complete the square to solve the equation below. x^2+2x-9=15

Step-by-step explanation:

x^2+2x-9=15

x^2+2x=24

x^2+2x+1=24+1

(because what you do to one side you do to the other) ^

(x+1)^2=25

(x+1)^2 -25=0

(25 is a perfect square)

(x+1-5)(x+1+5)

(x-4)(x+6)

x=4,-6

step-by-step explanation:

i think something is missing in your question because y-1=(x-12) would not pass through the point (-4,-3). because if you replace x by -4 your are supposed to find y=-3 which is not the case her. if you replace x by -4 you find =-15.

i assume the right equation is y-1=1/4*(x-12) because this one is passing through both your points (if you are interested to know how i found that out i can tell you).

in this equation if i replace x by -4 i find y=-3 and if i replace x by 12, i find y=1 so the line representing this equation is passing through those 2 points.

then the standard form of the equation is finding an expression of y in function of x

y-1=1/4*(x-12)

y=x/4-3+1

y=x/4-2

hope that .

do you confirm there was a mistake in the question?