Question

VA ROG RAPID OFER COROANA!!​

Answer 1

Răspuns:

2/ √7 amplificam cu √7 = 2√7/7

3/√7-2 amplificam cu √7= 3√7/7-2=3√7/5

4/√5+1 amplificam cu√5=4√5/5+1= 4√5/6=2√5/3

4/ 3√5 amplificam cu√5=4√5/3×5=4√5/15

5/3√7 amplificam cu√7=5√7/3×7=5√7/21

5/3-√7 amplificam cu√7=5√7/3-7=5√7/ - 4

(x-2)²= x²-4x+4

(2x+1)²= 4x²+4x+1

(3x-y)²= 9x²-6xy+y²

(2x+3y)²= 4x²+12xy+9y²

(2√2+3)²= 8+12√2+9= 17+12√2

(3√2-2)²= 18-12√2+4= 22-12√2

25x²-1= (5x-1)(5x+1)

49-x²= (7-x)(7+x)

9x²-4= (3x-2)(3x+2)

16x²-9y²= (4x-3y)(4x+3y)

Explicație pas cu pas:

Sper ca te am ajutat!!