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Ninamaria
@Ninamaria
May 2020
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Determine o zero das equacoes f(x)=(x-1)²-9
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Verified answer
f(x)=(x-1)²-9
f(x)= x² -1² - 9
f(x)= x²- 10
x²=10
x= +/- √10
x'=√10
x"= - √10
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3478elc
f(x)=(x-1)²-9
f(x)= x² - 2x +1 - 9
f(x) = x
² - 2x - 8
Δ = (-2)² - 4.1.(-8) = 4 + 32 = 36
x = 2 +/- V36 ==> x = 2 +/- 6
2 2
x1 = 2 + 6 ==>
x1 = 4
2
x2 = 2 - 6 ==>
x2 = -2
2
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Verified answer
f(x)=(x-1)²-9f(x)= x² -1² - 9
f(x)= x²- 10
x²=10
x= +/- √10
x'=√10
x"= - √10
f(x)= x² - 2x +1 - 9
f(x) = x² - 2x - 8
Δ = (-2)² - 4.1.(-8) = 4 + 32 = 36
x = 2 +/- V36 ==> x = 2 +/- 6
2 2
x1 = 2 + 6 ==> x1 = 4
2
x2 = 2 - 6 ==> x2 = -2
2