(x + 5)(x + 5)

= x² + 10x + 25

(a - b)2

= 2a - 2b

(x + y)(x + y)

= x² + 2xy + y²

(x - 8)2

= 2x - 16

(2x + 5)(2x + 5) =

= 4x² + 20x + 25

Answer:

1.(x+5)(x+5)=x²+10x+25

2.(a-b)²=a²-2ab+b²

3.(x+y)(x+y)=x²+2xy+y²

4.(x-8)²=x²-16x+64

5.(2x+5)(2x+5)=4x²+20x+25

Step-by-step explanation:

1.(x+5)(x+5)

x²+5x+5x+25

x²+10x+25

2.(a-b)²

a²-ab-ab+b²

a²-2ab+b²

3.(x+y)(x+y)

x²+xy+xy+y²

x²+2xy+y²

4.(x-8)²

x²-8x-8x+64

x²-16x+64

5.(2x+5)(2x+5)

4x²+10x+10x+25

4x²+20x+25