Using the quadratic formula to solve x2 + 20 = 2x, what are the values of x?
a.1 plus-or-minus startroot 21 endroot i
b. negative 1 plus-or-minus startroot 19 endroot i
c.1 plus-or-minus 2 startroot 19 endroot i
d.1 plus-or-minus startroot 19 endroot i

10 * 563.67 = 5636.7

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2

provide more details to solve it

step-by-step explanation: