Question

resposta da equação x2-7=10x+4

Answer 1

x^2-7=10x+4
x^2-10x-7-4
x^2-10x-11=0
delta=b^2-4ac
delta=(-10)^2-4.1.(-11)
delta=100+44
delta=144
x=-b-/+ raiz de delta/2a
x=-(-10)-12/2.1
x=10-12/2
x=-2/2
x=-1
x=-(-10)+12/2.1
x=10+12/2
x=22/2
x=11
S={-1, 11}

Answer 2

x² - 7 = 10x + 4 
x² - 10x - 4 - 7 = 0
x² - 10x - 11 = 0
Δ= (-10)² - 4 . 1 . (-11)
Δ= 100 + 44
Δ= 144

x= $\frac{-(-10)+- \sqrt{144} }{2.1}$
x= $\frac{10+-12}{2}$
x'= $\frac{10+12}{2}$
x'= $\frac{22}{2}$
x'= 11
x''= $\frac{10-12}{2}$
x''= $\frac{-2}{2}$
x''= -1

S: {11,-1)

Espero ter ajudado :)