Question

Ajutor va rog mult!!!!
$49 {x}^{2} + 14x - 8 \\ 64 {x}^{2} - 16x - 15 \\ 9 {x}^{2} - 6x - 3$

Answer 1

Răspuns

Explicație pas cu pas:

49x²+14x-8=(49x²+14x+1)-9=(7x+1)²-3²=(7x+1-3)(7x+1+3)=(7x-2)(7x+4)

64x²-16x-15=(64x²-16x+1)-16=(8x-1)²-4²=(8x-1-4)(8x-1+4)=(8x-5)(8x+3)

9x²-6x-3=(9x²-6x+1)-4=(3x-1)²-2²=(3x-1-2)(3x-1+2)=(3x-3)(3x+1)=3(x-1)(3x+1)