Let the numbers be a,b : Then ab = -30 and b = -30/a : Substituting in a + b = 7 gives :-
a + (-30/a) = 7 : a - 30/a = 7 : multiplying all terms by a :-
a2 - 30 = 7a : a2 - 7a - 30 = 0
Solving for the roots of a quadratic equation.
a = {7 ± √(72 - [4 x -30])} ÷ 2 = 3.5 ± 6.5
Then a = 10 (3.5 + 6.5) and b = -3 (3.5 - 6.5)
find two positive numbers whose product is a maximum. 1.) the sum is s.
9 and 6
you are a nerd
They are: 4 and -3
The numbers are 18 and 20.
19
find two positive numbers whose product is a maximum. 1.) the sum is s.
asked to work out the product of two or more numbers, then you need to multiply the numbers together. If you are asked to find the sum of two or more numbers, then you need to add the numbers together.
10 and 3
9 and 6
you are a nerd
They are: 4 and -3
8 and 8
8 and 5
The numbers are 18 and 20.
Three and Seven
17 and 3 are two prime numbers whose sum is 20. Their product is 51.