Question

the factors of are
${x}^{2} - 10x + 21$
1 .
$(x + 7)(x - 3)$
2 .
$(x - 7)(x - 3)$
3 .
$(x + 7)(x + 3)$
4 .
$(x - 7)(x + 3)$
​

Answer 1

Answer:

option two

-7*-3 gives +21

which is the third term of the quadratic equation.