section+9.3+-+factoring+trinomials+(part+2)

9.3 continued Zero- product property If a*b=0, then one or both of the factors has to = 0 Ex) solve for x

X(2x+1)=0 2x^2=0 or x=0 x=-.5 or x=o -1/2(2(-1/2)+1)=0 -1/2(-1+1)=0 -1/2(0)= 0

x^2 +5x+4=0 (x+1)(x+4)= 0 x=-1 x=-4

x^2+8x=20 -20 -20

x^2+8x-20=0 (x-2)(x+10)=0 x=2 x=-10

solve for a

a^2=6q-8

a^2-6a+8=0

a=2 a=4