Question

(x² - 7x + 10) - (x - 2)= ?????

Answer 1

    x^2-7x+10-x+2 = 

= x^2-8x+12

= (8 +- √64-4*12) / 2*1 (fórmula de Bhaskara)

= (8 + - √64-48)/2

= (8 +- √16)/2

X1 = (8 + 4)/2 = 6

X2 = (8 - 4) / 2 = 2