Factorise 4y^2-121m^2?

2 ⤊

2006-08-30 12:01:39 · 5 answers · asked by Desert Storm 1 in Science & Mathematics ➔ Mathematics

Difference of squares.

2006-08-30 12:04:09 · answer #1 · answered by sgcfx949 2 · 0⤊ 0⤋

4y^2 - 121m^2 = (2y - 11m)(2y + 11m)

2006-08-30 23:54:05 · answer #2 · answered by Sherman81 6 · 0⤊ 0⤋

The answer is 42

2006-08-30 19:06:53 · answer #3 · answered by jeff the drunk 6 · 0⤊ 0⤋

remember formula

a^2 - b^2 = (a + b)(a - b)

4y^2-121m^2
= 2y . 2y - 11m . 11m
= (2y + 11m)(2y - 11m)

2006-08-30 19:06:17 · answer #4 · answered by pohon88 1 · 1⤊ 0⤋

4y^2 - 121m^2
= (2y - 11m) (2y + 11m)

=)

2006-08-30 19:05:58 · answer #5 · answered by Jess 2 · 1⤊ 0⤋