The result of simplifying x + 2x is

About  monomial $$2y^{3^{ }}z^4$$   it is false to affirm that

The numerical value of $$\frac{4}{3}\pi r^3$$   when  r=3 is

  The polynomial that represents the perimeter of the figure is

the absolute degree of the polynomial $$3m^4n-m^2n^2+6mn^2$$  is

The result of $$-\lfloor-[-(x-1)]+(x-1)\rfloor$$  is

The result of $$(x^2-1)-(1-x^2)$$  is

When subtracting  $$x^2$$   from 2x²  gives the following result

The velocity v of a car, expressed in m/s, is related to the time t , expressed in seconds, by the expression v = 10 + 2t. Three seconds after the start of the movement, the velocity of the car is

The numerical value of the expression xy² + 1 when x = 3 and y = -2 is.

The polynomial that represents the shaded area of the figure is

The expression that represents twice a number plus three times the same number is

$$(3a^3b^2)(4a^2b^3)$$  is equal to

 -5a(a - b) is equal to

(a² + b²)(a + b) is equal to

The area of the rectangle in the figure is represented by the expression