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Let integers be x and y
x + y = 5
x y = - 66
x ( 5 - x ) = - 66
5x - x² = - 66
x² - 5 x + 66 = 0
( x - 11 ) ( x + 6 ) = 0
x = 11 , x = - 6
Integers are 6 , - 11
11 & -6................
11 and -6 are the two integers whose sum is 5 and product is -66.
Two integers whose sum is 5 and product is -66: 11 and -6
if the sum of the two integers, a and b, is 5:
a + b = 5
and if the product of the two integers is -66:
a * b = -66
we can find a in terms of b and plug it back into another equation:
a = 5 - b
If a = b - 5 in this equation, we have to assume it is true in the other one to find the values that satisfy the system, therefore:
(5 - b) * b = -66
-b^2 + 5b + 66 = 0
b^2 - 5b - 66 = 0
(b - 11) (b + 6) = 0
your two numbers will be -6 and 11
xy = -66
Solve the system of equations.
x = -11, y = 6
A+B=5 >>> B=5-A
AB= -66
A(5-A)=-66
5A - A² = -66
0 = A² - 5A -66
0 = (A+6)(A-11)
A= -6, 11 and B= 11, -6 by the pairing
Product is -66 and sum is +5 so -6 and +11 are the two numbers
x+y=5
xy=-66
So
x=5-y and y=(-66/x)
x=(5x+66)/x
x²=5x+66
x²-5x-66=0
x=-6 so y=11
x=11 so y=-6
x+y = 5
xy = –66
y = 5 – x
x(5–x) = –66
5x – x² = –66
x² – 5x – 66 = 0
(x + 6)(x – 11) = 0
x = 11, –6
y = –6, 11
-6 and 11
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Answers & Comments
:-
Let integers be x and y
x + y = 5
x y = - 66
x ( 5 - x ) = - 66
5x - x² = - 66
x² - 5 x + 66 = 0
( x - 11 ) ( x + 6 ) = 0
x = 11 , x = - 6
Integers are 6 , - 11
11 & -6................
11 and -6 are the two integers whose sum is 5 and product is -66.
Two integers whose sum is 5 and product is -66: 11 and -6
if the sum of the two integers, a and b, is 5:
a + b = 5
and if the product of the two integers is -66:
a * b = -66
we can find a in terms of b and plug it back into another equation:
a + b = 5
a = 5 - b
If a = b - 5 in this equation, we have to assume it is true in the other one to find the values that satisfy the system, therefore:
a * b = -66
(5 - b) * b = -66
-b^2 + 5b + 66 = 0
b^2 - 5b - 66 = 0
(b - 11) (b + 6) = 0
your two numbers will be -6 and 11
x + y = 5
xy = -66
Solve the system of equations.
x = -11, y = 6
A+B=5 >>> B=5-A
AB= -66
A(5-A)=-66
5A - A² = -66
0 = A² - 5A -66
0 = (A+6)(A-11)
A= -6, 11 and B= 11, -6 by the pairing
Product is -66 and sum is +5 so -6 and +11 are the two numbers
x+y=5
xy=-66
So
x=5-y and y=(-66/x)
x=(5x+66)/x
x²=5x+66
x²-5x-66=0
x=-6 so y=11
x=11 so y=-6
x+y = 5
xy = –66
y = 5 – x
x(5–x) = –66
5x – x² = –66
x² – 5x – 66 = 0
(x + 6)(x – 11) = 0
x = 11, –6
y = –6, 11
-6 and 11