Step-by-step explanation:
we just do the multiplications that squaring is :
(x² + y²)² = (x² + y²)(x² + y²) =
= x⁴ + x²y² + x²y² + y⁴ = x⁴ + 2x²y² + y⁴
(x² - y²)² + (2xy)² = (x² - y²)(x² - y²) + 2xy×2xy =
= x⁴ - x²y² - x²y² + y⁴ + 4x²y² =
= x⁴ - 2x²y² + y⁴ + 4x²y² =
= x⁴ + 2x²y² + y⁴
as you can see, both results are the same.
therefore, the original equation is a true identity.
Answer:
4×3=12 total cost for the drinks
12.75 + 12= $24.75 total cost for the pizza and drinks combined
Answer:
The shape of the graph of the parametric equations given is:
Step-by-step explanation:
By inserting each of the equations given in a graphing calculator (Annex 1), it can be identified that both the first and second equations have an elliptical or ellipse shape, which is characterized by being periodic in the two directions in which it runs. Thus, the equation x = 3 cos t runs with elliptical motion on the Y-axis of the Cartesian plane, while the equation y = 2 without t + 1 runs with elliptical motion on the X-axis.
Answer:
400
Step-by-step explanation:
99 + 1 = 100
100 + 100 = 200
200 + 200 = 400
Answer: See attached
Step-by-step explanation: