Answer: x = 7
Step-by-step explanation:
x(x-1) = 42 (Area)
By trial and error method let's take x = 7
We get
7(7-1) = 42
7 x 6 = 42
42 = 42
Therefore LHS = RHS
Therefore it's 7
Hope this helps
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Answer:
In this equation y = 2a - x
Step-by-step explanation:
In order to find this, we simply need to follow the order of operations to solve for y.
a = (x + y)/2 ----> Multiply both sides by 2
2a = x + y ----> Subtract x from both sides.
2a - x = y
If complex coefficients are allowed, the answer is 3.
If the polynomial must have real coefficients, then each complex root comes as a pair of complex conjugate roots.
Root -5 is real, so that is 1 root, and degree 1.
Root 1 + 4i is complex, so it must come with its complex conjugate, 1 - 4i. This adds 2 roots to the polynomial, and now we're up to degree 3.
Root -4i is also complex. It also must come with its complex conjugate, 4i. That adds two more roots, and the degree is 5.
Answer: The least possible degree is 5 with real coefficients.
Just substitute 5 into a and -2 into k
