Answers

2015-07-06T21:11:09+08:00
F(0)=3x²+5x-18
=3(0)+5(0)-18
=0+0-18
=-18

f(-x)=3x²+5x-18
=3(-x)²+5(-x)-18
=3x²-5x-18 or

f(x-5)=3x²+5x-18
=3(x-5)²+5(x-5)-18
=3(x²-10x+25)+5x-25-18
=3x²-30x+75+5x-43
=3x²-25x+22 or
=(3x-22)(x-1)
0