Question

Acest test.Dau coroană!Vă rog!​

Answer 1

Răspuns:

1) a)x²-2x+9; b)4x²+12x+9; c)16x²-14

2)x²+4x+4+2(4x²-9)-(9x²-12x+4)=x²+4x+4+8x²-18-9x²+12x-4=16x-18

3)a=4+16+64=84

5)a=(x-2)²+1>0

4)9x²-30x+25-4x²-4x-1=5x²-34x+24

6)√(5-2√6) = √(√3 - √2)²

√(5+2√6) = √(√3 +√2)²

√(4+2√3)²=4+2√3

b=√3-2+√3+√2-4-2√3=-4