Question

4) ) Determine as raízes das seguintes equações: b) x2-7x+10=0 a) x2-4x+3=0​

Answer 1

Resposta:

a) x2-4x+3=0

${( - 4)}^{2} - 4 \times 1 \times 3 \\ 16 - 12 \\ = 4 \\ \sqrt{4} = + - 2 \\ \\ x = \frac{4 + - 2}{2} \\ \\ x1 = \frac{4 + 2}{2} \\ \\ x1 = \frac{6}{2} = 3 \\ \\ x2 = \frac{4 - 2}{2} \\ \\ x2 = \frac{2}{2} = 1$

X1 = 3

X2 = 1