Question

For which value of x does the graph of y = 3x2 − 2x − 5 cross the x-axis?

Answer 1

@galacticwavesXX

Answer 2

this means solve
\[3x^2-2x-5=0\]

Answer 3

luckily this one factors as
\[(x+1)(3x-5)=0\] so it is not too bad to solve

Answer 4

-1 ??

Answer 5

lol just like @satellite73 the equation is factor-able and has been factored for you.

there should be 2 values of x

Answer 6

there is \[(x+1)=0\] and \[(3x-5)=0\] solve for the x values

You already got the first one, now solve for the 2nd

Answer 7

5/3

Answer 8

:D there ya go!!

Answer 9

my choices i only have -1 so ill put that one :)

Answer 10

ohh okay i see what you are talking about.

Put the choices down next time too, to better understand the question

Answer 11

Decide which part of the quadratic formula tells you whether the quadratic equation can be solved by factoring.

−b b2 − 4ac 2a

Use the part of the quadratic formula that you chose above and find its value given the following quadratic equation:

2x2 + 7x + 3 = 0

Answer 12

@galacticwavesXX

Answer 13

Is the 1st part the 3 options?

Answer 14

i guess so :p

Answer 15

its the 2nd one which is \[b^2-4ac=0\]

now use the quadratice equation given an plug it in to the formula above

you get \[7^2-4(2)(3)=0\] then you have \[25\] which is \[5^2\] so equation is factor-able

Answer 16

lol my bad i thought i had posted this up

Answer 17

lmao!!! what is the answer? 5^2 ? or do i put 25 lol

Answer 18

hmmmm...how do they want you to put down the answer?

Answer 19

its a fill in the blank ..For Fill in the blank items, you may type in any digits between 0 and 9, – for a negative sign, / for a fraction bar, or a decimal point. Do NOT type in commas, dollar signs, percent signs, variables, or spaces. If there are extra spaces at the end of your answer, the computer will mark that problem incorrect.

Answer 20

so it cant be 25 since its numbers 0 - 9

Answer 21

@galacticwavesXX

Answer 22

lol ok then its 5...no It Has to be 5!

Answer 23

let me show u my question... just to be sure

Answer 24

i guarantee its 5. since its 0 to 9 plus 25 is 5^2 and 5 can be factored