Question

restul exercitiilor va rog mult​

Answer 1

Subiectul B

1. E(1) = 2*1+3*1-1 = 2+3-1 = 4

2. E(-2) = 4*4+3*(-2)-2 = 16-6-2 = 8

3. 9a²+3a

4. -6x*(-5x²) = +30x³

5. -8x³:(-2x) = +4x²

Subiectul C

1. A

2. F (corect este x²-10x+25)

3. A

Subiectul D

a) E(x) = (2x²+1)

b) E(x) = x²+2x+3x+6 = x(x+2)+3(x+2) = (x+2)(x+3)

c) E(x) = (x-√5)(x+√5)

1. a) 3ab+5bc = b(3a+5c)

b) 8cd+5ac = c(8d+5a)

c) 17ax+5ay = a(17x+5y)

d) 13xz+6xy = x(13z+6y)

2. a) 9ay-4az = a(9y-4z)

b) 8cx-5cy = c(8x-5y)

c) 15ab-7ac = a(15b-7c)

d) 17mn-7mp = m(17n-7p)

3. Nu imi amintesc aceasta metoda

4. a) a(7x+2y)+2b(7x+2y) = (7x+2y)(a+2b)

b) c(5y+8z)+3b(5y+8z) = (5y+8z)(c+3b)

5. a) 8(17+33)+9(17+33) = 50(8+9) = 50*17 = calculezi tu

b) 13(37+63)+17(37+63) = 100(13+17) = 100*30 = 3000