Resolve cada uma das equações seguintes:
a. (-x-1)(-2x-1)=0
2
b. x (x-2)(x+3)=0
c. x\2 (3x-1) (2x-7)=0
3
d. (x-x+3)(x-x+1)=0
2 4 3

answer: it's upside down and i can't read it

step-by-step explanation:

p ÷ r = tan(x)

step-by-step explanation:

given that there is a figure below shows a right triangle: a right triangle is shown with hypotenuse equal to q units and the length of the legs equal to p units and r units.

graph is missing so i will create the graph as per given information.

the angle between the legs having lengths p units and q units is y degrees. the angle between the legs having lengths r units and q units is x degrees.

now we need to find about what is p ÷ r equal to.

so we can use trigonometric ratio tan(x)=[altitude]/[base] to find the value of p ÷ r, because p is the altitude and r is the base.

p ÷ r=tan(x)

hence final answer is p ÷ r=tan(x).