Question

Resolver a equação x2-11x+28=0

Answer 1

a = 1, b = -11, c = 28
Delta = (-11)^2 -4 (1) (28) = 121 - 112 = 9
x = -(-11) +- raiz de 9 / 2 (+1)
x = + 11 +- 3 /2

x' = +11 + 3 /2 = 14/2 = 7
x'' = 11 - 3/2 = 8/2 = 4

Bons estudos!

Answer 2

Use Bhaskara.

Delta= (-11)^2 -4.1.28

=121-112

Delta=9

x=-(-11)+- raiz de delta/ 2.1

x=11+-3/2

x1=11-3/2

X2=11+3/2