Question

5. Determine o valor de x nas equações:
a) 5× = 625
b) 2 ×2 -4×+3=1​

Answer 1

a)

5× = 625

5× = 5⁴

x = 4

b)

2 ×2 -4×+3=1

2 ×2 -4×+3= 2⁰

x² -4x + 3= 0

∆ = 16-12=4 => √∆=2

x' = 4+2/2 = 3

x" = 4-2/2 = 1