Si coloca una escalera de 25 pies contra la parte superior de un edificio de 24 pies, ¿cuántos pies estará la parte inferior de la escalera desde la
parte inferior del edificio?

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct

the answer would be  

a.

3: 1

step-by-step explanation:

x=3y-6

step-by-step explanation:

solve for   x by simplifying both sides of the equation, then isolating the variable.