Question

Factor the polynomial x2 + 3x - 28. Enter each factor as a polynomial in descending orde

Answer 1

you need 2 numbers whose product is -28 and whose sum is + 3

Answer 2

can you think of them?

finding the prime factors of -28 will help:-

28 = -2 * 2 * 7

Answer 3

if we take just 2 factors
we have

-4 * 7
or 4 * -7
OK/

Answer 4

which one of those add up to +3?