Question

Which of the following is a factor of x^2- 21x + 110? (1 point)
Question 3 options:

1) x + 11

2) x - 10

3) x - 5

4) None of the above

Answer 1

when you factorise you can see that the two constant terms must multiply to be the same as the last term in the quadratic

so in this case the last term is +110
so if the first option is correct (x+11) then what is the other factor? (x+a)

where 11 x a = 110

Answer 2

so if the second option is correct (x-10) then what is the other factor? (x+a)

where -10 x a = +110

Answer 3

iso if the 3rd option is correct (x-5) then what is the other factor? (x+a)

where -5 x a = +110

Answer 4

in the above I have written x for 'times' (do not confuse it with x the variable) sorry for confusion

Answer 5

so if the first option is correct (x+11) then what is the other factor? (x+a)
where 11 * a = 110

so if the second option is correct (x-10) then what is the other factor? (x+a)
where -10 * a = +110

so if the 3rd option is correct (x-5) then what is the other factor? (x+a)
where -5 * a = +110

Answer 6

im not sure whats the answer @MrNood