Question

Imi puteti da o idee la exercitiile 17 si 18 ? :))) E urgent va rog ajutati ma ! :))))
Dau coroana ! :)))

Answer 1

17.
a)(x^2+2x+1)+1=(x+1)^2 + 1 mai mare sau egal 0.
b)(x^2-4x+4)+1=(x+2)^2 + 1 mai mare sau egal 0.
c)E rezolvat.
d)(x^2-8x+16)+1=(x-4)^2 + 1 mai mare sau egal 0.
e)(4x^2+12x+9)+1=(2x+3)^2 + 1 mai mare sau egal 0.
f)(25x^2+30x+9)+2=(5x+3)^2 + 2 mai mare sau egal 0.

18.
a)(x^2-4)(x^2+4)=(x-2)(x+2)(x^2+4)
b)(a^2-4b^2)(a^2+4b^2)=(a-2b)(a+2b)(a^2+4b^2)
c)(x^2-1)(x^2+1)=(x-1)(x+1)(x^2+1)
d)(16x^2-25)(16x^2+25)=(4x-5)(4x+5)(16x^2+25)
e)(x^2/4 - 9)(x^2/4 + 9)=(x/2 - 3)(x/2 + 3)(x^2/4 + 9)
f)(x^4 - y^4)(x^4 + y^4)=(x^2-y^2)(x^2+y^2)(x^4+y^4)=(x-y)(x+y)(x^2+y^2)(x^4+y^4)
g)(x^2-100)(x^2+100)=(x-10)(x+10)(x^2+100)
h)(x^2-2)(x^2+2)=(x-rad2)(x+rad2)(x^2+2)