What is the greatest common factor (gcf) of the numerator and denominator
of the rational expression below?
4x+ 20
x2 + 2x -15
a. x
b. x-3
c. x+5
d.4

C

Step-by-step explanation:

x²+2x-15 = x²-3x+5x-15 = x(x-3)+5(x-3)=(x+5)(x-3)

or delta:

∆=2²-4*1*(-15)=4+60=64

√∆=8

x1 = (-2+8)/2 = 3

x2=(-2-8)/2=-5

and 4x+20 = 4(x+5)

The same is (x+5), so it is GCF. answer C

x+5

Step-by-step explanation:

A

P

E

X

you should at least use a calculater

step-by-step explanation:

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

hope this : )