Question

Descompuneti in factori :a) 25x²-4 ; b) x²-81; c)16x²-4; d) x²-3; e) (5x²-1)-y² ; f) 7x²-1; g) (2x-1)²-(x+3)²;
h)(4x-1)²-(5x+1)²..:*

Answer 1

Gata,draga mea:* mareste imaginea daca nu intelegi sau intreaba-ma

Answer 2

a) 25x²-4=(5x-2)(5x+2)....... b) x²-81=(x+9)(x-9)......... c)16x²-4=(4x-2)(4x+2)....... d) x²-3=(x -√3)(x+√3)........ e) (5x²-1)-y² = (5x^2-1-y)(5x^2-1+y)........ f) 7x²-1=(x√7-1)(x √7+1)............ g) (2x-1)²-(x+3)²=(2x-1-x-3)(2x-1+x+3)=(x-4)(3x+2)............ h)(4x-1)²-(5x+1)²=(4x-1-5x-1)(4x-1+5x+1)=(-x-2)*9x=-9x(x+2)