Question

factor 9u^2+42u+49 Please help! D:

Answer 1

Hint: this is a perfect square
take the square roots of the first and last terms

Answer 2

3 and 7?

Answer 3

oh 45u+7?

Answer 4

the 7 is right ( well its + 7)
but dont forget the u^2

Answer 5

OK so now what now that i have45u+7?

Answer 6

its not 5u - what is the square root of 9u^2

Answer 7

3u. but i added that to the 42u and got 45u

Answer 8

- no you cant do that
these trinomials ( also called quadratics) factor out to the form
(a + b)(c + d)

in this case its (a + b)(a + b)

where the middle term = 2ab
in this case 2ab = 42u

Answer 9

oh im kind of confused...