How do I factorise this equation?

1 ⤊

5x2y + 15xy2
The two's mean squared.

Expand and simplify this equation
(2x + 5)(3x-4)

These equations are part of GCSE Maths revision, thanks.

2007-04-03 06:40:33 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

5x^2 y + 15xy^2
= 5xy (x + 3y)

(2x + 5)(3x - 4)
(2x)(3x) + (2x)(-4) + (5)(3x) + (5)(-4)
6x^2 - 8x + 15x - 20
6x^2 + 7x - 20

2007-04-03 06:44:20 · answer #1 · answered by Mathematica 7 · 1⤊ 0⤋

5x2y + 15xy2 = 5xy(x +3y)
[5xy is common to both terms]

(2x + 5)(3x-4) [This is an expression -- not an equation.
= 6x^2 +15x -8x -20 = 6x^2 +7x -20

2007-04-03 06:48:52 · answer #2 · answered by ironduke8159 7 · 0⤊ 0⤋

5x^2y+15xy^2
=5xy(x+y)

(2x + 5)(3x-4)
=2x(3x-4)+5(3x-4)
=6x^2-8x+15x-20
=6x^2+7x-20

2007-04-03 06:52:30 · answer #3 · answered by Bubblez 3 · 0⤊ 0⤋