Question

AJUTOR!!! VĂ DAU COROANĂ!!! ​

Answer 1

Răspuns:

6. A) 2x-5y+3y-x

=X-2y

B) (7x-5y) - ( 3x-5y) +2x

=7x-5y-3x+5y+2x

= 6x

C) x²y+xy-xy²-(xy-xy²+x²)

= x²y+xy-xy²-xy+xy²-x²

= x²y - x²

D) 2(x+y-xy) - 3(xy-x-y)+(y-x-xy)

= 2x+2y - 2xy - 3xy+3x+3y+y-x-xy

= 4x +6y - 6xy

E) - 4(x+y-z) +3(x-y+z)-2(-x+y+z)

= - 4x-4y+4z+3x-3y+3z+2x-2y-2z

= x - 9y +5z

7. = A) t⁴+5t³-14t

B) (a²+1)-(a²-1)(a²+1)

(a²+1)-(a⁴-1)

a²+1-a⁴+1

-a²+2

C)=3(z³-z²+z+z²-z+1)-3(z³-z²-z+1)

= 3(z³+1)-3z³+3z²+3z-3

= 3z³+3-3z³+3z²+3z-3

=3z²+3z

D)= b^8+4b⁴+4-(b⁴-4)(b⁴+4)

=b^8+ 4b⁴+4-(b^8-16)

=b^8+4b⁴+4-b^8+16

=4b⁴+20

8.A)= x²-4x+4-(x²-x+3x-3)

=X²-4x+4-x²+x-3x+3

=-6x+7

B) = (x²-4)(x²+4)-(x⁴-2x²+1)

=x⁴-16-x⁴+2x²-1

=2x²-17

C)= (2x²-xy+4xy-2y²)-2(x²+2xy+y²)

=2x²+3xy-2y²-2x²-4xy-2y²

= - 4y²-xy

Explicație pas cu pas:

Sper ca te am ajutat!!