Answer:
4.5 x 0.72
Step-by-step explanation:
I AM ASSUMING THAT YOU FORGOT TO ADD 2 AFTER 0.7 IN 4.5 x 0.7
No, a cubic equation can not have three complex roots. This is because it turns twice and one end goes to positive infinity and one end goes to negative infinity. Thus, one of these MUST cross the x-axis at some point, meaning y = 0 and a real root exists.
Yes, a cubic equation can have three real roots if it cuts the x-axis three times.
-44.09 i dont understand why we must have 20 characters but OK
Answer:
Step-by-step explanation:
Given the equation 4x²+ 49y² = 196
a) Differentiating implicitly with respect to y, we have;

b) To solve the equation explicitly for y and differentiate to get dy/dx in terms of x,
First let is make y the subject of the formula from the equation;
If 4x²+ 49y² = 196
49y² = 196 - 4x²

Differentiating y with respect to x using the chain rule;
Let 





c) From the solution of the implicit differentiation in (a)

Substituting
into the equation to confirm the answer of (b) can be shown as follows

This shows that the answer in a and b are consistent.