x2 = 49
x2 = 49
x2 – 49 = 0
x2 = 49
x2 – 49 = 0
(x – 7)(x + 7) = 0
x2 = 49
x2 – 49 = 0
(x – 7)(x + 7) = 0
x = 7 or -7
x2 + 6x + 9 = 30
x2 + 6x + 9 = 30
x2 + 6x – 21 = 0
x2 + 6x + 9 = 30
x2 + 6x – 21 = 0
2
x + 6x + 9 = 30
x2 + 6x + 9 = 30
x2 + 6x – 21 = 0
2
x + 6x + 9 = 30
(x + 3)(x + 3) = 30
x2 + 6x + 9 = 30
x2 + 6x – 21 = 0
2
x + 6x + 9 = 30
(x + 3)(x + 3) = 30
(x + 3)2 = 30
x2 + 6x + 9 = 30
x2 + 6x – 21 = 0
2
x + 6x + 9 = 30
(x + 3)(x + 3) = 30
(x + 3)2 = 30
x2 + 6x + 9 = 30
x2 + 6x – 21 = 0
2
x + 6x + 9 = 30
(x + 3)(x + 3) = 30
(x + 3)2 = 30
x2 + 6x + 9 = 30
x2 + 6x – 21 = 0
2
x + 6x + 9 = 30
(x + 3)(x + 3) = 30
(x + 3)2 = 30
or
x2 + 6x + 9 = 30
x2 + 6x – 21 = 0
2
x + 6x + 9 = 30
(x + 3)(x + 3) = 30
(x + 3)2 = 30
or
x2 + 6x + 9 = 30
x2 + 6x – 21 = 0
2
x + 6x + 9 = 30
(x + 3)(x + 3) = 30
(x + 3)2 = 30
or
or
or
or
or
or
16x2 + 40x + 25 = 23
16x2 + 40x + 25 = 23
(4x + 5)(4x + 5) = 23
16x2 + 40x + 25 = 23
(4x + 5)(4x + 5) = 23
(4x + 5)2 = 23
16x2 + 40x + 25 = 23
(4x + 5)(4x + 5) = 23
(4x + 5)2 = 23
16x2 + 40x + 25 = 23
(4x + 5)(4x + 5) = 23
(4x + 5)2 = 23
16x2 + 40x + 25 = 23
(4x + 5)(4x + 5) = 23
(4x + 5)2 = 23
x -0.05 or -2.45
When factoring will not
work to solve a quadratic
equation, sometimes it is
possible to solve a
quadratic equation by
taking the square root of
both sides.