Question

4) 2(x+3) + 3(x+5)
5) (x+1)2 + (x+2)2 =
6) (x-3) (x+3) + 4 X² =​

Answer 1

Răspuns:

2(x+3) + 3(x+5)=

2x+6+3x+15=

5x+21

(x+1)2+(x+2)2=

2x+1+2x+4=

4x+5

(x-3)(x+3)+ 4x²=

x²-3²+4x²=

x²-9+4x²=

3x²-9