Question

Quais as raizes dessa equação y=x²-7x+10 ?

Answer 1

x²-7x+10 /A=1 / B=-2 / C = 10
b2-4ac
4-4.1.10
4-40=-36
-b/2a =-4/2=-2
-delta/4a = +36/4 = 9
V (-2;9)

Answer 2

Olá Barbára!

$Y= x^{2} -7x+10 \\ d=( -7)^{2} -4.10 \\ d=49-40 \\ d=9 \\ \sqrt{d}=3 \\ \\ \\ x'= \frac{7+3}{2} \\ x'=5 \\ \\ x''= \frac{7-3}{2} \\ x''=2$

As raízes portanto serão 5 e 2