Question

Vreau ajutor că sunt prost și nu știu !!!​

Answer 1

Răspuns:

Explicație pas cu pas:

SE FOLOSESTE FORMULA        a²-b²=(a-b)(a+b)

a) (2(a+1)-3))(2a+2+3)=(2a-2)(2a+5)=2(a-1)(2a+5)

d)(3x-3x+2)(3x+3x-2)=2(6x-2)=4(3x-1)

b) (5(2x+1)-4))(10x+5+4)=(10x+1)(10x+9)

c) (2(2x-3)-3))(2(2x-3)+3))=(4x-6-3)(4x-6+3)=(4x-9)(4x-3)

e)(4(x+2)-5))(4(x+2)+5))=(4x+8-5)(4x+8+5)=(4x+3)(4x+13)

f)(3(x+3)+2x))(3(x=3)-2x))=(3x+9+2x)(3x+9-2x)=(5x+9)(x+9)

g)(5x-2x-1)(5x+2x+1)=(3x-1)(7x+1)

h)(5(3x+1)-2x)(5(3x+1)+2x)=(15x+5-2x)(15x+5+2x)=(13x+5)(17x+5)

i)(2(x-5)-3x))(2(x-5)+3x)=(2x-10-3x)(2x-10+3x)=-(x+10)(5x-10)=-5(x+1)(x-2)