Question

Is 2m^2 + 13m + 15 prime?

Answer 1

Because i cant find a way to sove this problem Help please?

Answer 2

use the quadratic formula, but keep in mind that you need an equation for this and what you have posted is simply what is called an "expression", it may "evaluate" to a prime number for a given value of m but as an expression this dosent mean much, there's probably an equal sign in the problem somewhere that you left out when you posted the expression

Answer 3

no it is not prime

Answer 4

How? and im talking about factoring it...

Answer 5

You can find factors for this trinomial by multiplying the coefficient of your squared term times the constant. You must then find factors of this result which add to the coefficient of your middle term.

Answer 6

In other words, what are the factors of 2x15=30 which give you a sum of 13. axb=30 and a+b=13

Answer 7

\[(m+5)(m+\frac{ 3 }{ 2 })\]

Answer 8

wait so is it 2(m+10)(m+3)

Answer 9

You cannot factor out a 2 because not all the terms are divisible by two.

Answer 10

just a not on terminology, if by "prime" you mean it cant be factored then we say "unfactorable"

Answer 11

so (2m+10) (m+3) (im just taken shots in the dark here)

Answer 12

u can write \[2m^2+13m+15=>2m^2+10m+3m+5\]

Answer 13

\[now , 2m(m+5)+3(m+5)\]

Answer 14

\[(2m+3)(m+5)\]

Answer 15

oohhhh i see ok

Answer 16

Thank You! :)

Answer 17

my pleasure :)

Answer 18

@twisted,do you see how she split up the middle term? That is because the factors of 30 which add to 13 are 10 and 3.

Answer 19

oops @Twisted_Ouroborous

Answer 20

lol XD and yes i do

Answer 21

Great!