Answer:
(Note: I used the factoring method. No need to use this if you're not sure about it. Since I used factoring.)
x = 0, x = 3
Step-by-step explanation:
2x²-3x-9=(x+3)(x-3)
Step 1: Simplify both sides of the equation
2x²-3x-9=x²-9
Step 2: Subtract x²-9 from both sides
2x²-3x-9- (x²-9) = x²-9- (x²-9) [*Note: You can ignore this]
x²-3x=0
Step 3: Factor left side of equation
x(x-3)= 0
Step 4: Set factors equal to 0
x=0 or x-3=0
x=0 or x=3
