What is a=7x^2-3x+10
b=-4x^2+6x-4
a-b=

7x2−3x+10−(−4x2)−(6x)−−4

simplify

Multiply -4 by -1

7x2−3x+10+4x2−(6x)− −4

multiply 6 by -1

7x2−3x+10+4x2−6x− −4

10 to 4 11x2−9x+14

25/4

step-by-step explanation:

call segment cd's length x. because dc and ab are parallel, angle acd and cab, so triangles adc and abc are similar and we can set up the equation x / ac = ac / ab, or x / 5 = 5 / 4 and x = 25/4.

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation: