Question

21. 1) (2x - 3)2 – (3x – 5)";
3) 16(2x + 5)2 - 81(4 - 5x)";
5) (2a - 1)3 – 27aº;
2) (3x + 2) - (1 - 2x)";
4) 0,01a2 – (a - 3)2;
6) (3x - 2) + (5 - 4x)".​

Answer 1

1)4х2-9-3х-5=4х2-3х-14