matrix by vector multilplication

[astarmathsandphysics]

Corners of a square at(0,0),(1,0),(0,1),(1,1)

by matrix

(2,3)
(4 1)

 (2,3)(0)=(0)
(4 1)(0)=(0)

(2,3)(1)=(2*1+3*0)
(4 1)(0)=(4*1+1*0)

(2,3)(0)=(2*0+3*1)
(4 1)(1)=(4*0+1*1)

(2,3)(1)=(2*1+3*1)
(4 1)(1)=(4*1+1*1)

[angell]

thank u a hundreddd thousannnnnnnnd times over!!!!:D:D:D:D:D:D