1. x ( x + 9 ) = - 20
Remove the parentheses
x² + 9x = - 20
Move the constant to the left
x² + 9x + 20 = 0
Rewrite the expression
x² + 5x + 4x + 20 = 0
Factor the expressions
x ( x + 5 ) + 4 ( x + 5 ) = 0
Factor the expression
( x + 5 ) × ( x + 4 ) = 0
Seperate into possible cases
x + 5 = 0
x + 4 = 0
Solve the equations
x = - 5
x = - 4
The equation has 2 solutions
Solution
x = - 5, x = - 4
2. nasa picture yung number 2
3. nasa picture din, pero hindi magkasya di pa yan complete
