Question

vj

Answer 1

a)f(x)-g(x)+h(x)=(x³-2x²+3x+1)-(x³+x+1)+(2x²-1)

                            =x³-2x²+3x+1-x³-x-1+2x²-1

                            =2x-1

b)2x-1=5

<=>2x=5+1

<=>2x=6

<=>x=6:2

<=>x=3