what are the roots of the equatin 0=x^2+5x-14?

Question

i need lots and lots and lots and lots of help please my teacher is stupid enough to move before the red eyeflashes

Answer 1

x^2 + 5x - 14 = 0

you need to factor:  that means that you need to factor the last number to get a number to match the center value.  7 - 2(7 * 2 = 14) = 5 (the center number)

(x + 7)(x - 2) = 0

x = -7 or x = 2

check:

(-7)^2 + 5*(-7) -14 = 0

49 - 35 - 14 = 0

14 - 14 = 0 yes, checks

2^2 + 5*2 - 14 = 0

4 + 10 - 14 = 0

14 - 14 = 0 YES, CHECKS