3 years ago

Find f(4) if f(x) = x —6

Mathematics

2 answers:

Andru [333]3 years ago

5 0

Answer:

-12

Step-by-step explanation:

frutty [35]3 years ago

4 0

Use the substitution method

f(4)=4-6

=-2

Answer :-2

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irina1246 [14]

$5x^3 - 4x + 1 = 0 \\\\5x^3-5x+x+1=0\\\\5x(x^2-1)+1(x+1)=0\\\\5x(x+1)(x-1)+1(x+1)=0\\\\(x+1)(5x(x-1)+1)=0\\\\(x+1)(5x^2-5x+1)=0\\\\x=-1\\\\5x^2-5x+1=0\\\\\Delta=(-5)^2-4\cdot5\cdot1=25-20=5$

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In total, there are 3 real roots. But, real roots are also complex roots (doesn't work the other way round!), so there are 3 complex roots.

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3 years ago

Find f(4) if f(x) = x —6​

Find f(4) if f(x) = x —6