Question

2 x elevado a 2 + 10x + 7

Answer 1

2 x elevado a 2 + 10x + 7
2x^2 + 10x+7
a=2; b = 10; c = 7
∆= b^2-4ac
∆= 10^2 - 4.2.7
∆= 100 - 8.7
∆= 100 - 56
∆= 44
√∆= √44 = √4.√11 = 2√11

X = [-b +/- √∆]/2a
X = {-10 +/- 2√11]/2.2
x = (-10/4 +/- 2√11/4
x = -5/2 +/- √11/2
X' = (-5 - √11)/2
X" = (-5 + √11)/2