this is gayy.
i dont like it. im having trouble on it and the test is tomorow!
what is 36m^2-84m+49?
and how do i get the answer?
or a^2-4ab+4b^2
2007-04-12 13:29:26 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
it is the completion of a square here
(6m-7)^2
6m x6m=36m^2
6m x-7=-42m doubled because you are squaring the problem..so it is -84m
-7^2=49
36m^2-84m+49
(a-2b)^2 same idea as the first one
2007-04-12 14:27:40 · answer #1 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
(6m - 7)(6m -7) The middle and outer 2 add up to - 84m.
(a - 2b)(a - 2b).
Find factors of the first and last that add or subtract to giev the middle term.
2007-04-12 20:34:55 · answer #2 · answered by richardwptljc 6 · 0⤊ 0⤋
36m^2-84m+49=(6m-7)^2
a^2-4ab+4b^2=(a-2b)^2
2007-04-12 20:38:26 · answer #3 · answered by jrome 2 · 0⤊ 0⤋