1use the factor therem to factorise the following cubics as

1use the factor therem to factorise the following cubics as far as possible:f(x)=x(的三次方)-7x+62find a given that (x+4) is a factor of f(x)=x(的三次方)+8x^+ax+12 and hence factorise f(x) completely.3show that (x-2) is a factor of f(x)=x的三次方-4x^+x+6 and hence solve f(x)=0.4find the three solutions to each of the following equations 10x的三次方-29x^+25x-6=05the expression ax^+bx+6 has remainder 15 when divided by (x-1) and remainder 1 when divided by (x+1).find the values of a and b.6given that (x^-1)is a factor of x的三次方+ax^+bx -4 ,find the values of a and b