Mathematics: What numbers add to 32 and multiply to -80? ?

What numbers add to 32 and multiply to -80? ?

Ответ:

nat5841

01.01.2022

X+y=32
xy=-80

x+y=32
minus x both sides
y=32-x
sub for y

x(32-x)=-80
32x-x^2=-80
times both sides by -1
x^2-32x=80
minus 80 both sides
x^2-32x-80=0
use quadratic formula
where
ax^2+bx+c=0
x= $\frac{-b+/- \sqrt{b^2-4ac} }{2a}$

a=1
b=-32
c=-80

x= $\frac{-(-32)+/- \sqrt{(-32)^2-4(1)(-80)} }{2(1)}$
x= $\frac{32+/- \sqrt{1024+320} }{2}$
x= $\frac{32+/- \sqrt{1344} }{2}$
x= $\frac{32+/- 8\sqrt{21} }{2}$
x=16+/-4√21

the numbers are
16+4√21 and 16-4√21

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Ответ:

lefarrioe8621

30.09.2022

Mathematics

Basically, you need to use the information given to create two algebraic equations and then solve using substitution
Mark and john are driving to the beach. mark drove 25 miles more than half the number of miles ron d

Mark and john are driving to the beach. mark drove 25 miles more than half the number of miles ron d

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What numbers add to 32 and multiply to -80? ?

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