Question

Resolva: A: (x-2) ao quadrado -x= 1
B: x elevado ao quadrado = 4/5x + 1/

Answer 1

a) (x-2)² = (x-2).(x-2) = x²-2x-2x+4

x²-2x-2x+4 = x²-4x+4

(x-2)² = x²-4x+4

x²-4x+4-x = 1

x²-4x-x = 1-4

-5x = -3 <×1>

5x = 3

x = 3/5



b) 4(5x+1)=

20x+4

x² = 20x+4

x²-20x = 4

19x = 4

x = 4/19