That doesn't factor neatly. Applying the quadratic formula, we find two real solutions: (-5 plus or minus 2 times the square root of 10) divided by 5.
x = 0.2649110640673518
x = -2.2649110640673518
That will depend on the plus or minus value of 40 which has not been given.
If it's +40 then when factored it is (x-5)(x-8)
x2 - 10x - 39
= x2 + 3x - 13x - 39
= x(x + 3) - 13(x + 3)
= (x - 13)(x + 3)
If that's 6x - 40, and one of the choices is either (x + 10) or (x - 4), pick that one.
I'm guessing you meant to write x2 - 13x + 40 and you meant to include a list of binomials to choose from. Since that factors to (x - 5)(x - 8), make sure that one of those is on the list.
Factors are (x - 13)(x + 3)
(x - 8)(x + 1)
just like factoring any other trinomial.
It's not enough to copy the question off the test. If you don't tell us what the trinomial is, we can't factor it for you.
(t - 15)(t + 3)
just make the trinomial easier to factor. ex -x2 + 3x + 4 ... most books don't teach you how to factor when a leading term is negative. ... so -1(x2- 3x- 4) ... now factor again ignoring the -1 -1(x - 4)(x + 1)
That's not a trinomial, but it factors to x(x + 19)
The GCF is 5x2.
The GCF is 5x2
5x2 and 10x3
5x2-18x+9 = (5x-3)(x-3)
(5x - 1)(x + 3)
5x2-16x+12 = (5x-6)(x-2) when factored
(5x - 1)(x + 6)
(5x + 2)(x + 1)
10x3 + 3x2
5x2+11x+2 = (5x+1)(x+2) when factored
the prime factorizatation of 30 is 30 ^ 10x3 ^ 5x2 =5x2x3
5x2 + 14x - 3 let 14x = 15x - x=5x 2 + 15x - x - 3 factor out 5x and -1 = 5x(x + 3) - 1(x + 3) factor (x + 3) = (x + 3)(5x - 1)