Es la expresión algebraica que representa la superficie de un terreno rectangular, si su longitud es 3
veces más grande de su ancho.
a) (3X)(X)
b) 3X -X
c) 3X + X
d) 3(X+X)

24

step-by-step explanation:

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1