Question

1. Incercuieste litera corespunzatoare raspunsului corect:
Ecpresia algebrica 4 supra √2 a²b are coeficientul:
a) 4
b)2√2
c)3√2
d)6√2

2. complecteaza spatiile libere:
a) (______________ +2y) (________-2y)=9x²-___________
b) (______________ -2y)² =_________-12xy+4y²
c) (6a+___________)²=36a²+__________+25b²

3. Adu expresia la forma cea mai simpla:
a)5a(2x-1)-(2x+1)(a-3)=
b)(x+1)²+(3x+1)(3x-1)=

VA ROG MULT AJUTOOR LA TOATE TREI

Answer 1

1. a)4

2.a) ( 2+4y+9+2y) (2+4-2y)=9x-6
b) (2+4+9+6-2y)=19-12xy+4y
c) (6a+2y++9+19)=36a+2+4+25b

3.a) 5a(2x-1)-(2x+1)(a-3)=5(2x1-2+1-3)
b) ( x+1)+(3x+1)(3x1)=1+3+1(3x1)