0
Your equations are then x+y = 3
and
xy = -40
Subtracting y from both sides of the first equation we get
x = 3 - y
Substituting this into the second equation we get
xy = -40
(3-y)y = -40
Expanding this we get
-y^2 + 3y = -40
Add 40 to both sides, and multiply by -1 to get
y^2 - 3y - 40 = 0
Factor this to
(y-8)(y+5) = 0
So the zeroes are at y = 8 and y = -5
which means x = -5 and x = 8
Add your answer:
Earn +20 pts
What two numbers multiply to get -40 and add to get -3?
-43
What two numbers multiply together to equal -40 and add together to equal -3?
-43
How many integers between 1 and 40 are multiples of 3 or 7?
LCM of 3 and 7 under 40 is 21
What are to integers product -40 and sum -3?
-37
What two numbers multiply to 60 and add up to 23?
83
What 3 numbers get you to 10 and when you multiply all 3 numbers you get 40?
no 3 numbers add to equal 10 and multiply to equal 40.
What are the numbers when you add you get -3 when multiplied you get 40?
There are no two real numbers that do. Using complex numbers, these two do: (-3/2 + i√151/2) & (-3/2 - i√151/2) Two numbers that add to -3 and multiply to -40 are -8 & 5 Two numbers that add to 3 and multiply to -40 are 8 & -5 Two complex numbers that add to 3 and multiply to 40 are (3/2 + i√151/2) & (3/2 - i√151/2)
What two numbers add to -40 and multiply to 60?
20
What two numbers can multiple together to get 3 but add together to get 5?
8
What two numbers multiply to get -40 and add to get -3?
-43
What two numbers can you multiply to get -40 and add up to 3?
-37
What can you add subtract and multiply to equal 43?
40 + 3 50 - 7 43 x 1
What three numbers add up to 10 and multiply to give 30?
40
What can you multiply and add to get 843?
you can multiply 281 and 3 you can add 840 and 3
What two numbers multiply together to equal -40 and add together to equal -3?
-43
Factor a2 minus 8ab plus 15b2?
What integers add to -8 and multiply to 15? Sounds like -3 and -5, so: (a - 3b)(a - 5b)
How do you add and subbtract positive and negative integers?
When adding negative integers, you subtract. (2+-1=1) When subtracting negative integers, you add. (2--3=5)
