Question

Mtk
1. (2× + 5y)²
2.(2× - 5y)²
3. (5y - 2y)²
4.( y - x )²

Answer 1

1.
2.
3.
4.

Answer 2

1. (2× + 5y)²
= 4x²+2(2x+5y)+25y²
= 4x²+20xy+25y²

2.(2× - 5y)²
= 4x²+2(2x-5y)+25y²
= 4x²-20xy+25y²

3. (5y - 2y)²
= 25y²+2(5y-2y)+4y²
= 25y²-20y²+4y²
= 9y²
atau (5y-2y)²= (3y)²=9y²

4.( y - x )²
= y²+2(y-x)+y²
= y²-2xy+y²

semoga membantu :)