Question

\[2x ^{2} + 11x -21 \]

Factor of the polynomial

Answer 1

(x+7)(2x-3)

Answer 2

i factored, or u could use the quadratic formula.....

Answer 3

Could you show me the formula's? I wanna be able to work and understand the problem.

Answer 4

\[x = -b +/- radical b2 - 4ac/2a\]

Answer 5

when you do so much factoring in school, it becomes like multiplication.

Answer 6

whatever

Answer 7

I am confused! xD How do i solve it where do i start?

Answer 8

do u know the quadratic formula?

Answer 9

no, sorry I don't this is all new to me

Answer 10

ok, let me show you

Answer 11

thanks! I appreciate it a lot!

Answer 12

x = -b+/-radicalb2 - 4ac/2a, a,b,c,x2,x, integer.....

Answer 13

the problem is 2x2 + 11x - 21,
let a = 2, b = 11, c = -21.....

Answer 14

the plug in the formula,
let x = -11 =/- radical121 - 4 times 2 times - 21/2 times 2.....

Answer 15

simplify, eventually it becomes,
x = -7, 3/2.....

Answer 16

righting this in factor form means making individual equations!!!!!

Answer 17

easy.....

Answer 18

1. x = -7,
(x+7) = 0,
2. x = 3/2,
(2x - 3) = 0.....

Answer 19

He doesnt want to solve it......:/

Answer 20

thus, (x+7)(2x-3) = 2x2 + 11x - 21.....

Answer 21

there is no reason to show him quadratic formula. You have to learn both ways of solving for x so you can't avoid factoring by just showing the quadratic formula.

Answer 22

can u leave ryanl, your violating the rules of open study, so contribute, or leave

Answer 23

the quadratic formula is the easiest way for starters since all your doing is plugging in numbers.....