Solve the Eqautions??????????

7x sqaured = -21x

x sqauered - 2x = 0

Bonus:D

Factor theese

400y sqaured -9


xsqaured + 6x + 9

1.) 7x² = -21x
7x²+21x = 0
7x(x+3) = 0

7x = 0 or x+3 = 0
x = 0 or x = -3
Solutions: x = -3 or x = 0

2.) x²-2x = 0
x(x-2) = 0

x = 0 or x-2 = 0
x = 0 or x = 2
Solutions: x = 0 or x = 2

3.) 400y²-9 → (20y-3)(20y+3)

4.) x²+6x+9 → (x+3)²

Add 21x to both sides to get:
7x^2 + 21x Factor

7x (x + 3)
7x = 0
x = 0 or x = -3

x + 3 = 0
x = -3

Factor x^2 - 2x to x (x - 2)
x = 0 or x = 2

400y^2 - 9
(20y - 3) (20y + 3)

x^2 + 6x + 9
(x + 3) (x + 3)