The set is not closed
Example
-4 * -2 = 8
8 is not a negative integer
16x^4-81y^4 difference of perfect squares...
(4x^2-9y^2)(4x^2+9y^2) that's one of the equivalents...
(2x+3y)(2x-3y)(4x^2+9y^2) that's another one of them...
Answer:
looks hard
Step-by-step explanation:
You have to expand the expression so that it becomes
3m+3n
Hello,
The parabola having like focus (0,p/2) and as directrix y=-p/2 has as equation x²=2py
Here -p/2=2==>p=-4
x²=-8y is the equation.