SOLUTION: Use the elimination method to find the TWO solutions of this system. Mark TWO answers. {y=9(x+4)^2 – 81 {y=−9(x+4)^2+81 (3, 0) (-3, 0) (5, 0) (-1, 0)

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Question 1080571: Use the elimination method to find the TWO solutions of this system. Mark TWO answers.
{y=9(x+4)^2 – 81
{y=−9(x+4)^2+81

(3, 0)

(-3, 0)

(5, 0)

(-1, 0)

(-7, 0)

(-9, 0)
Found 2 solutions by MathLover1, MathTherapy:
Answer by MathLover1(20849)   (Show Source): You can put this solution on YOUR website!



.......









solutions:
, => -> point (,)
and
, =>-> point (,)

Answer by MathTherapy(10551)   (Show Source): You can put this solution on YOUR website!
Use the elimination method to find the TWO solutions of this system. Mark TWO answers.
{y=9(x+4)^2 – 81
{y=−9(x+4)^2+81

(3, 0)

(-3, 0)

(5, 0)

(-1, 0)

(-7, 0)

(-9, 0)
 ------- eq (i)

 ----- eq (ii)

2y = 0 ------- Adding eqs (ii) & (i)

y = 0



 ------- Substituting 0 for y in eq (i)

 ---------- Adding 81 to both sides

 ------------- Dividing each side by 9

 -------- Taking square root of both sides





x = 3 - 4,    OR      x = - 3 - 4

x = - 1       OR      x = - 7

Solutions: 

That's how SIMPLE this is!! 

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