Question

1. (5х-2)²
2. (6а-b)²
3. (4х+5t)²
4. (2х+7y)²
5. (7а-4n)²
6. (3m+2b)²
7. (4a-3b)²

Answer 1

1)25x2-20x+4
2)36a2-12ab+b2
3)16x2+40xt+25t2
4)4x2+28xy+49y2
5)49a2-56an+16n2
6)9m2+12mb+4b2
7)16a2-24ab+9b2