Question

Solve each equation, if possible. Write irrational numbers in simplest radical form. Identify the strategy you used to get your solution.
1. x^2 – 9 = 0
2. x^2 + 4x + 2 = 0

Answer 1

so r they 2 separate ones?

Answer 2

i dont get this

Answer 3

yes too separate ones

Answer 4

1.(x+3)(x-3)

Answer 5

how did you get that ?

Answer 6

x^2 - 9 = 0
x^2=9
x= 3 or -3

Answer 7

ok thank you :)

Answer 8

Take the middle term, divide it in half, and square it.
(-2)^2=4

That means the third term needs to be 4. Get it there by adding 2 to both sides of the equation.

x^2-4x+4=2

Factor

(x-2)^2=2
x-2=sqrt2
x=2+sqrt2

Answer 9

thank you