Question

Resolver a equações

a)(x²-4)=(x²-3x+1)=(x²-4)(2x-5)

b)x²(x²-1)=(x²-1)(-2x+1)

c)(x-1)(x-2)=(x-3)(x-1)

d)(x²-7x+12)(x²-x-1)=(-x-1)(x²-7x+12)

e)(x²-x+1)(x²-x)=(-x-2)(x²-x+1)

Answer 1

a)(x²-4)=(x²-3x+1)=(x²-4)(2x-5)
x²-4= 
x = + ,- √4
x= +- 2
2x-5 = 
2x = 5
x= 5/2