Question

Exercitiile 1 2 3 rapid dau coroana

Answer 1

1) (2x-√3)²=4x²- 4√3x+3

2) 
√2x(√2-1/√2)=
=√2x ( √2 - 1√2 /2)=
=√2 x [( 2√2-√2)/2]=
=√2x ×√2 /2 =
=√4x/2=
=2x/2=
=x

3) (x²-6x)( x+8)= x³ +2x²-48x
=x³-6x²+8x²-48x=
=x²(x+8)-6x(x+8)=
=(x+8) (x²-6x)=
=x(x-6)(x+8)

Answer 2

1. 4x² - 2·2x·√3+(√3²) = 4x²- 4√3 x + 3
2. √2 x ·√2 - √2 x/√2 = 2x - x= x
3. (x²-6x)(x+8) = x³+ 8x²- 6x²- 48x= x³+2x² - 48x