Use the grouping method to factor this polynomial.
x+3x2 + 3x +9

10x + 9

Step-by-step explanation:

I'm assuming the 3x2 is 3 * x * 2

x + 3 * x * 2 + 3x + 9

x + 6x + 3x + 9

10x + 9

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