Answer:
So x^2 + 2xy - y^2
Step-by-step explanation:
Let "a" be added to x^2 + xy +y^2 to obtain 2x^2 + 3xy
So a = 2x^2 + 3xy - (x^2 + xy + y^2)
= 2x^2 + 3xy - x^2 -xy - y^2
= x^2 + 2xy - y^2.
So x^2 + 2xy - y^2 must be added.
Answer:
B. X= 5 + 3i
5 + 3i
Step-by-step explanation:
We are given the quadratic equation
x² - 10x = -34
x² - 10x + 34 = 0
Using Almighty formula
x = -b ± √b² - 4ac/2a
When given equation: ax² + bx + c
Where: a = 1, b = -10 , c = 34
x = -10 ± √-10² - 4 × 1 × 34/2 × 1
x = 10 ± √100 - 136/2
x = 10 ± √-36 /2
x = 10/2 ±. √-36/2
x = 5 ± 6i /2
x = 5 ± 3i
Hence: the roots of the equation are:
x = 5 - 3i , x = 5 + 3i
Give me more details please
Answer:
y = 3.8 - 0.2x.
Step-by-step explanation:
y = k - 0.2x where k is the thickness of the ice before the melting starts and x = the number of weeks.
When x = 7, y = 2.4 therefore:
2.4 = k - 0.2*7
k = 2.4 + 1.4 = 3.8.
So our equation is y = 3.8 - 0.2x.