+130560 OK....let's do this as follows
(5x -2) * (5x -2) take both the terms in the first parentheses and distribute each over the terms in the second set of parentheses.....so we have....
5x(5x - 2) - 2(5x - 2)
[25x^2 - 10x] [-10x + 4]
So......combining like terms, we have
25x^2 - 10x - 10x + 4 =
25x^2 -20x + 4
+130560 Think about this....
3^2 = 3 * 3
So
(5x - 2)^2 must be (5x - 2) * (5x - 2) ... and using "FOIL" we have
25x^2 - 10x - 10x + 4 simpliify
25x^2 - 20x + 4
Still confused. Do not know where thee 10+10 came from that gave you 20 .. I do not get this at all.
+130560 OK....let's do this as follows
(5x -2) * (5x -2) take both the terms in the first parentheses and distribute each over the terms in the second set of parentheses.....so we have....
5x(5x - 2) - 2(5x - 2)
[25x^2 - 10x] [-10x + 4]
So......combining like terms, we have
25x^2 - 10x - 10x + 4 =
25x^2 -20x + 4
