Question

can someone help me? Factor: x^2 - 13x + 36

Answer 1

Hint:
x^2 - 4x - 9x + 36

Answer 2

x^2-9x-4x+36

Answer 3

x^2-13x+36

Answer 4

?

Answer 5

@Hero

Answer 6

then i wrote -13x+36=-x^2
36=-x^2+13x
36/13=-^2+13x/13
2=x^3 ? <<<is that right?

Answer 7

Not exactly.

Answer 8

Here's another hint:

x^2 - 4x - 9x + 36
x(x - 4) - 9(x - 4)

Answer 9

(x-4)(x-9)?

Answer 10

Yes, finally...

Answer 11

You can check it by multiplying it back out:

(x - 4)(x - 9) = x(x - 9) - 4(x - 9) = x^2 - 9x - 4x + 36 = x^2 - 13x + 36