Algebra II Solve equations?

1) -2|7x| ≥ 46

-14x >_ 46

x >_ 46 /-14

x >_ -3.286 (to 3 d.p.)

2) 3x^2 + 5 = 65

3x^2 = 60

x^2 = 20

x = root 20

x = 4.472 (to 3 d.p.)

3) -2(x+7)^2 = -34

-2 ((x+7)(x+7)) = -34

-2 ( x^2 + 7x + 7x + 49) = -34

-2 ( x^2 + 14x + 49) = - 34

-2x^2 - 28x - 98 = - 34

-2x^2 - 28x -64 = 0

impossible to solve

4) x^2 + 15x + 50 = 0

(x + 10)(x + 5)

x = -10

and

x = -5

5) x^2 - 4x + 1 = 20 -7

x^2 - 4x + 1 = 13

x^2 - 4x - 12 = 0

( x - 6)( x + 4)

x = 6

and

x = -4

6) 3x^2 + 5x + 2 = 0

(3x + 2)(x + 1)

3x = -2

x = (-2 /3)

and x = -1

Hope this helps!

3x^2 + 9x - 12 = 0 element out a three 3(x^2 + 3x - 4) = 0 3(x+4)(x-a million) = 0 considered one of the two numbers would desire to be equivalent to 0 x+4 = 0; x = -4 x-a million = 0; x=a million those are your 2 solutions! solid success - M