What is the greatest common factor (GCF) of the numerator and denominatorof the rational expression below?4x+ 20x2 + 2x -15A.x B.x-3C.x+5D.4
Accepted Solution
A:
Answer:CStep-by-step explanation:xΒ²+2x-15 = xΒ²-3x+5x-15 = x(x-3)+5(x-3)=(x+5)(x-3) or delta:β=2Β²-4*1*(-15)=4+60=64ββ=8x1 = (-2+8)/2 = 3x2=(-2-8)/2=-5and 4x+20 = 4(x+5)The same is (x+5), so it is GCF. answer C