Solve the quadratic equation by completing the square.
x^2 +4x- 9=0
first, choose the appropriate form and fill in the blanks with the correct numbers.
then, solve the equation. if there is more than one solution, separate them with commas.

x = -2 ±√13

Step-by-step explanation:

To complete the square, take the middle term bx and divide it in two. Then take the square.

x^2 + 4x - 9 has bx = 4x. Take 4/2 = 2. Square 2^2 = 4.

Now to finish completing the square add 4 to each side.

x^2 + 4x - 9 = 0

x^2 + 4x  + 4 - 9 = 4

(x+2)^2 -9 = 4

Add 9 to both sides and take the square root of each side to solve.

(x+2)^2 = 13

(x+2) = ± √13

x = -2 ±√13

answer: if you weigh 60 pounds on earth, on the moon you will weigh about 10 pounds. if you weigh 120 pounds on earth, you will weigh about 20 pounds on the moon. since weight is caused by the mass of two objects that are near each other, the bigger the objects, the more the force of gravity.

step-by-step explanation: if you weigh 60 pounds on earth, on the moon you will weigh about 10 pounds. if you weigh 120 pounds on earth, you will weigh about 20 pounds on the moon. since weight is caused by the mass of two objects that are near each other, the bigger the objects, the more the force of gravity.

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

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