Question

solve 15t²-15t-30=0 medal awarded

Answer 1

dont i find factors for -thirty

Answer 2

factor out the 15 first ... then you have the usual:

15 (x^2+ ...)

Answer 3

you want the first term to be "nekkid"

Answer 4

nekkid do you mean naked??

Answer 5

like a catt

Answer 6

no like an apple

Answer 7

:)

Answer 8

that 15 is just dressing, we need to take it off .....

Answer 9

how dare you not simplify this equation

Answer 10

get off of here please i dont like your sarcasm any way amistre ok so i forgot how to strip the t away from the 15

Answer 11

essentially, you divide everything by 15

Answer 12

15t^2/15 - 15t/15 - 30/15 = 0/15

t^2 - t - 2 = 0

Answer 13

okay so that gives me t²-t-2=0

Answer 14

correct, and that should be more than simple enough to determine solutions for :)

Answer 15

well i can add two to both sides and solve that would leave t²-t=2 so ill solve for t and t² t² would be 2 and t would be 2

Answer 16

m+n = -1
mn = -2

factors of -2 are:

1 -2

-2+1 = -1 ; so lets reverse signs: 1,-2 becomes -1,2

Answer 17

-1 and 2

Answer 18

id stick with those :)

Answer 19

ok

Answer 20

okay x²-8x+15=0

Answer 21

m+n = -8
mn = 15

factors of 15 are?

Answer 22

1 and 15
5 and 3

Answer 23

then lets use 5 and 3 in this fashion:

-5-3 = -8
(-5)(-3) = 15

those work marvelously

so reverse the signs: -3,-5 becomes 3,5

Answer 24

i think im starting to get this

Answer 25

okay somethi like this (x-2)²=49

Answer 26

well, hopefully we know that 7^2 = 49; and (-7)^2 = 49

x-2 = 7
or
x-2 = -7

Answer 27

if that wasnt a perfect square of there, the concept is the same:

(x-r)^2 = k when x-r = +- sqrt(k); x = r +- sqrt(k)

Answer 28

yes i know that

Answer 29

okay i still need help...