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stellarik [79]
3 years ago
6

Find the real or imaginary solutions of each equation by factoring

Mathematics
1 answer:
anyanavicka [17]3 years ago
8 0
Sum of  2 perfect cubes
a³+b³=(a+b)(x²-xy+y²)
so

x³+4³=(x+4)(x²-4x+16)
set each to zero
x+4=0
x=-4

the other one can't be solveed using conventional means
use quadratic formula
for
ax^2+bx+c=0
x=\frac{-b+/- \sqrt{b^2-4ac} }{2a}
for x²-4x+16=0
x=\frac{-(-4)+/- \sqrt{(-4)^2-4(1)(16)} }{2(1)}
x=\frac{4+/- \sqrt{16-64} }{2}
x=\frac{4+/- \sqrt{-48} }{2}
x=\frac{4+/- (\sqrt{-1})(\sqrt{48}) }{2}
x=\frac{4+/- (i)(4\sqrt{3}) }{2}
x=2+/- 2i\sqrt{3}


the roots are
x=-4 and 2+2i√3 and 2-2i√3
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Answer:

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An equation is linear when the exponents of the variables are 1 and the sum of the exponents of the variables in any term is 1.

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Which of the following rational numbers is equal to 4 point 7 with bar over 7 ? (5 points) 43 over 9 , 49 over 9 , 35 over 9 , 3
jenyasd209 [6]

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Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Which of the following interpretations of the mean is​ correct? A. The observed number of hits per game will be equal to the mea
sineoko [7]

Answer:

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